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ASP.NET GirdView实现折叠式效果

来源：互联网 发布：龚德柏 知乎 编辑：程序博客网 时间：2024/04/30 14:43

我们线看图的效果：

但是有个非常不爽的地方，就是GridView要进行回发操作，所以，点击或者展开折叠节点，都会进行数据的回发。

实现的原理是这样的，首先看一下绑定到GridView的datatable数据表格：

可以看到本数据集的构造方式，即parentID下面保存的都是父ID的节点，而ChildID为空；但是当某行数据为子类时，父类的 ParentID置空，而ChildID则存入子类ID值。这样，把这个数据集赋值给GridView的时候，稍微处理就可以达到开始的图片效果了，具体操作如下：

首先，需要在GridView的首列添加两个ImageButton按钮，分别为“MinBT”（-）和“PluseBT”（+），还包括一个 image标签。然后就是在RowCreated的时候，将GridView的行值赋值给imagebutton的commandargument属性，同时将datatable中数据的前两行ParentID和ChildID隐藏掉，具体代码如下：

 

[csharp] view plaincopyprint?
  1. protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)  
  2.    {  
  3.        if (e.Row.RowType == DataControlRowType.Header)  
  4.        {  
  5.            e.Row.Cells[1].Visible = false;  
  6.            e.Row.Cells[2].Visible = false;  
  7.        }  
  8.        if (e.Row.RowType == DataControlRowType.DataRow)  
  9.        {  
  10.            e.Row.Cells[1].Visible = false;  
  11.            e.Row.Cells[2].Visible = false;  
  12.            ImageButton btnMin = (ImageButton)e.Row.Cells[0].FindControl("MinBT");  
  13.            btnMin.CommandArgument = e.Row.RowIndex.ToString();  
  14.            ImageButton btnAdd = (ImageButton)e.Row.Cells[0].FindControl("PluseBT");  
  15.            btnAdd.CommandArgument = e.Row.RowIndex.ToString();  
  16.        }  
  17.    }  
 protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)    {        if (e.Row.RowType == DataControlRowType.Header)        {            e.Row.Cells[1].Visible = false;            e.Row.Cells[2].Visible = false;        }        if (e.Row.RowType == DataControlRowType.DataRow)        {            e.Row.Cells[1].Visible = false;            e.Row.Cells[2].Visible = false;            ImageButton btnMin = (ImageButton)e.Row.Cells[0].FindControl("MinBT");            btnMin.CommandArgument = e.Row.RowIndex.ToString();            ImageButton btnAdd = (ImageButton)e.Row.Cells[0].FindControl("PluseBT");            btnAdd.CommandArgument = e.Row.RowIndex.ToString();        }    }
 

然后，就是对按钮进行处理了，让有子节点的父类显示“+”按钮，而让没有子节点的父类显示“-”按钮，这需要在GridView1_RowDataBound事件中处理，具体代码如下：

[csharp] view plaincopyprint?
  1. protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)  
  2.     {  
  3.         if (e.Row.RowType == DataControlRowType.DataRow)  
  4.         {  
  5.             string ShowHide = e.Row.Cells[1].Text;  
  6.             ShowHide = ShowHide.Replace(" ", "");      
  7.             ShowHide = ShowHide.Replace(" ","");  
  8.             if (ShowHide.Trim().Length == 0)  //如果有子类，前面就会有空白，替换掉后，长度为0，反之则不为0  
  9.             {  
  10.                 ImageButton btnMin = (ImageButton)e.Row.Cells[0].FindControl("MinBT");  
  11.                 btnMin.Visible = false;   //不显示已展开按钮  
  12.                 ImageButton btnAdd = (ImageButton)e.Row.Cells[0].FindControl("PluseBT");  
  13.                 btnAdd.Visible = false;  //不显示可展开按钮  
  14.                 HtmlImage Line = (HtmlImage)e.Row.Cells[0].FindControl("Line");  
  15.                 Line.Visible = true;  //显示虚线框  
  16.             }  
  17.             else  
  18.             {  
  19.                 HtmlImage Line = (HtmlImage)e.Row.Cells[0].FindControl("Line");  
  20.                 Line.Visible = false;  //反之，则不现实虚线框  
  21.             }  
  22.         }  
  23.     }  
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)    {        if (e.Row.RowType == DataControlRowType.DataRow)        {            string ShowHide = e.Row.Cells[1].Text;            ShowHide = ShowHide.Replace(" ", "");                ShowHide = ShowHide.Replace(" ","");            if (ShowHide.Trim().Length == 0)  //如果有子类，前面就会有空白，替换掉后，长度为0，反之则不为0            {                ImageButton btnMin = (ImageButton)e.Row.Cells[0].FindControl("MinBT");                btnMin.Visible = false;   //不显示已展开按钮                ImageButton btnAdd = (ImageButton)e.Row.Cells[0].FindControl("PluseBT");                btnAdd.Visible = false;  //不显示可展开按钮                HtmlImage Line = (HtmlImage)e.Row.Cells[0].FindControl("Line");                Line.Visible = true;  //显示虚线框            }            else            {                HtmlImage Line = (HtmlImage)e.Row.Cells[0].FindControl("Line");                Line.Visible = false;  //反之，则不现实虚线框            }        }    }

 然后就是处理按钮的点击事件了：

 

[csharp] view plaincopyprint?
  1. protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)  
  2.     {  
  3.          
  4.         if (e.CommandName == "_Show")  //当点击展开按钮时  
  5.         {  
  6.             int index = Convert.ToInt32(e.CommandArgument);  //获取第几行  
  7.             GridViewRow row = GridView1.Rows[index];  
  8.             int G_Count = GridView1.Rows.Count;  //查出总行数  
  9.             for (int i = index + 1; i < G_Count; i++)  //从本行下面一行开始  
  10.             {  
  11.                 if (GridView1.Rows[i].Cells[1].Text == " ")  //如果遇见是子类  
  12.                 {  
  13.                     GridView1.Rows[i].Visible = true;  //那么本行显示  
  14.                 }  
  15.                 else  //如果遇见的不是子类  
  16.                 {  
  17.                     ImageButton Bt_Min = (ImageButton)row.Cells[0].FindControl("MinBT");  
  18.                     Bt_Min.Visible = true;  //那么已展开按钮显示  
  19.                     ImageButton Bt_plus = (ImageButton)row.Cells[0].FindControl("PluseBT");  
  20.                     Bt_plus.Visible = false;  //未展开按钮隐藏  
  21.                     break;  
  22.   
  23.                 }  
  24.                 ImageButton Bt_Min1 = (ImageButton)row.Cells[0].FindControl("MinBT");  
  25.                 Bt_Min1.Visible = true;  
  26.                 ImageButton Bt_plus1 = (ImageButton)row.Cells[0].FindControl("PluseBT");  
  27.                 Bt_plus1.Visible = false;  
  28.             }  
  29.   
  30.         }  
  31.         if (e.CommandName == "_Hide")  
  32.         {  
  33.             int index = Convert.ToInt32(e.CommandArgument);  
  34.             GridViewRow row = GridView1.Rows[index];  
  35.             int G_Count = GridView1.Rows.Count;  
  36.             for (int i = index + 1; i < G_Count; i++)  
  37.             {  
  38.                 if (GridView1.Rows[i].Cells[1].Text == " ")  
  39.                 {  
  40.                     GridView1.Rows[i].Visible = false;  
  41.                 }  
  42.                 else  
  43.                 {  
  44.                     ImageButton Bt_Min = (ImageButton)row.Cells[0].FindControl("MinBT");  
  45.                     Bt_Min.Visible = false;  
  46.                     ImageButton Bt_plus = (ImageButton)row.Cells[0].FindControl("PluseBT");  
  47.                     Bt_plus.Visible = true;  
  48.                     break;  
  49.   
  50.                 }  
  51.                 ImageButton Bt_Min1 = (ImageButton)row.Cells[0].FindControl("MinBT");  
  52.                 Bt_Min1.Visible = false;  
  53.                 ImageButton Bt_plus1 = (ImageButton)row.Cells[0].FindControl("PluseBT");  
  54.                 Bt_plus1.Visible = true;  
  55.             }  
  56.   
  57.         }  
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)    {               if (e.CommandName == "_Show")  //当点击展开按钮时        {            int index = Convert.ToInt32(e.CommandArgument);  //获取第几行            GridViewRow row = GridView1.Rows[index];            int G_Count = GridView1.Rows.Count;  //查出总行数            for (int i = index + 1; i < G_Count; i++)  //从本行下面一行开始            {                if (GridView1.Rows[i].Cells[1].Text == " ")  //如果遇见是子类                {                    GridView1.Rows[i].Visible = true;  //那么本行显示                }                else  //如果遇见的不是子类                {                    ImageButton Bt_Min = (ImageButton)row.Cells[0].FindControl("MinBT");                    Bt_Min.Visible = true;  //那么已展开按钮显示                    ImageButton Bt_plus = (ImageButton)row.Cells[0].FindControl("PluseBT");                    Bt_plus.Visible = false;  //未展开按钮隐藏                    break;                }                ImageButton Bt_Min1 = (ImageButton)row.Cells[0].FindControl("MinBT");                Bt_Min1.Visible = true;                ImageButton Bt_plus1 = (ImageButton)row.Cells[0].FindControl("PluseBT");                Bt_plus1.Visible = false;            }        }        if (e.CommandName == "_Hide")        {            int index = Convert.ToInt32(e.CommandArgument);            GridViewRow row = GridView1.Rows[index];            int G_Count = GridView1.Rows.Count;            for (int i = index + 1; i < G_Count; i++)            {                if (GridView1.Rows[i].Cells[1].Text == " ")                {                    GridView1.Rows[i].Visible = false;                }                else                {                    ImageButton Bt_Min = (ImageButton)row.Cells[0].FindControl("MinBT");                    Bt_Min.Visible = false;                    ImageButton Bt_plus = (ImageButton)row.Cells[0].FindControl("PluseBT");                    Bt_plus.Visible = true;                    break;                }                ImageButton Bt_Min1 = (ImageButton)row.Cells[0].FindControl("MinBT");                Bt_Min1.Visible = false;                ImageButton Bt_plus1 = (ImageButton)row.Cells[0].FindControl("PluseBT");                Bt_plus1.Visible = true;            }        }

 

 所有代码如下：

 

[csharp] view plaincopyprint?
  1. using System;  
  2. using System.Collections.Generic;  
  3. using System.Linq;  
  4. using System.Web;  
  5. using System.Web.UI;  
  6. using System.Web.UI.WebControls;  
  7. using System.Data;  
  8. using System.Data.SqlClient;  
  9. using System.Web.UI.HtmlControls;  
  10.   
  11. public partial class Default2 : System.Web.UI.Page  
  12. {  
  13.     public string connStr = System.Configuration.ConfigurationManager.AppSettings["connStr"];  
  14.   
  15.     protected void Page_Load(object sender, EventArgs e)  
  16.     {  
  17.         if (!IsPostBack)  
  18.         {  
  19.             using (SqlConnection conn = new SqlConnection(connStr))  
  20.             {  
  21.                 conn.Open();  
  22.                 string sql = "SELECT ParentName,ParentID,dateof FROM TreeParent tp ";  
  23.                 SqlCommand cmd = new SqlCommand(sql, conn);  
  24.                 DataTable dt = new DataTable();  
  25.                 dt.Columns.Add(new DataColumn("ParentID", typeof(string)));  
  26.                 dt.Columns.Add(new DataColumn("ChildID", typeof(string)));  
  27.                 dt.Columns.Add(new DataColumn("Name", typeof(string)));  
  28.                 dt.Columns.Add(new DataColumn("Dateof", typeof(string)));  
  29.                 SqlDataReader sdr = cmd.ExecuteReader();  
  30.                 while (sdr.Read())  
  31.                 {  
  32.                     DataRow dr = dt.NewRow();  
  33.                     int pID = Convert.ToInt32(sdr["ParentID"]);  
  34.                     dr["ParentID"] = (sdr["ParentID"]);  
  35.                     dr["ChildID"] = null;  
  36.                     dr["Name"] = sdr["ParentName"];  
  37.                     dr["Dateof"] = sdr["Dateof"];  
  38.                     dt.Rows.Add(dr);  
  39.                     DataTable myDT = GenerateDT(pID.ToString());  
  40.                     foreach (DataRow drChild in myDT.Rows)  
  41.                     {  
  42.                         DataRow drChildDT = dt.NewRow();  
  43.                         drChildDT["ChildID"] = drChild["ChildID"];  
  44.                         drChildDT["Name"] = drChild["ChildName"];  
  45.                         drChildDT["Dateof"] = drChild["Dateof"];  
  46.                         dt.Rows.Add(drChildDT);  
  47.                     }  
  48.                 }  
  49.                 sdr.Close();  
  50.                 GridView1.DataSource = dt;  
  51.                 GridView1.DataBind();  
  52.             }  
  53.   
  54.         }  
  55.     }  
  56.   
  57.     protected DataTable GenerateDT(string ParentID)  
  58.     {  
  59.         using (SqlConnection conn = new SqlConnection(connStr))  
  60.         {  
  61.             conn.Open();  
  62.   
  63.             DataTable dt = new DataTable();  
  64.             dt.Columns.Add(new DataColumn("ChildName", typeof(string)));  
  65.             dt.Columns.Add(new DataColumn("ChildID", typeof(string)));  
  66.             dt.Columns.Add(new DataColumn("Dateof", typeof(string)));  
  67.             string sql = "SELECT childID,childName,dateof FROM TreeChild tc where tc.ParentID=" + ParentID;  
  68.             SqlCommand cmd = new SqlCommand(sql, conn);  
  69.             SqlDataReader sdr = cmd.ExecuteReader();  
  70.             while (sdr.Read())  
  71.             {  
  72.                 DataRow dr = dt.NewRow();  
  73.                 dr["ChildName"] = sdr["childName"];  
  74.                 dr["ChildID"] = sdr["ChildID"];  
  75.                 dr["Dateof"] = sdr["Dateof"];  
  76.                 dt.Rows.Add(dr);  
  77.             }  
  78.             sdr.Close();  
  79.             return dt;  
  80.         }  
  81.     }  
  82.   
  83.   
  84.     protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)  
  85.     {  
  86.         if (e.Row.RowType == DataControlRowType.Header)  
  87.         {  
  88.             e.Row.Cells[1].Visible = false;  
  89.             e.Row.Cells[2].Visible = false;  
  90.         }  
  91.         if (e.Row.RowType == DataControlRowType.DataRow)  
  92.         {  
  93.             e.Row.Cells[1].Visible = false;  
  94.             e.Row.Cells[2].Visible = false;  
  95.             ImageButton btnMin = (ImageButton)e.Row.Cells[0].FindControl("MinBT");  
  96.             btnMin.CommandArgument = e.Row.RowIndex.ToString();  
  97.             ImageButton btnAdd = (ImageButton)e.Row.Cells[0].FindControl("PluseBT");  
  98.             btnAdd.CommandArgument = e.Row.RowIndex.ToString();  
  99.         }  
  100.     }  
  101.     protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)  
  102.     {  
  103.         if (e.Row.RowType == DataControlRowType.DataRow)  
  104.         {  
  105.             string ShowHide = e.Row.Cells[1].Text;  
  106.             ShowHide = ShowHide.Replace(" ", "");  
  107.             ShowHide = ShowHide.Replace(" ","");  
  108.             if (ShowHide.Trim().Length == 0)  
  109.             {  
  110.                 ImageButton btnMin = (ImageButton)e.Row.Cells[0].FindControl("MinBT");  
  111.                 btnMin.Visible = false;  
  112.                 ImageButton btnAdd = (ImageButton)e.Row.Cells[0].FindControl("PluseBT");  
  113.                 btnAdd.Visible = false;  
  114.                 HtmlImage Line = (HtmlImage)e.Row.Cells[0].FindControl("Line");  
  115.                 Line.Visible = true;  
  116.             }  
  117.             else  
  118.             {  
  119.                 HtmlImage Line = (HtmlImage)e.Row.Cells[0].FindControl("Line");  
  120.                 Line.Visible = false;  
  121.             }  
  122.         }  
  123.     }  
  124.     protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)  
  125.     {  
  126.          
  127.         if (e.CommandName == "_Show")  
  128.         {  
  129.             int index = Convert.ToInt32(e.CommandArgument);  
  130.             GridViewRow row = GridView1.Rows[index];  
  131.             int G_Count = GridView1.Rows.Count;  
  132.             for (int i = index + 1; i < G_Count; i++)  
  133.             {  
  134.                 if (GridView1.Rows[i].Cells[1].Text == " ")  
  135.                 {  
  136.                     GridView1.Rows[i].Visible = true;  
  137.                 }  
  138.                 else  
  139.                 {  
  140.                     ImageButton Bt_Min = (ImageButton)row.Cells[0].FindControl("MinBT");  
  141.                     Bt_Min.Visible = true;  
  142.                     ImageButton Bt_plus = (ImageButton)row.Cells[0].FindControl("PluseBT");  
  143.                     Bt_plus.Visible = false;  
  144.                     break;  
  145.   
  146.                 }  
  147.                 ImageButton Bt_Min1 = (ImageButton)row.Cells[0].FindControl("MinBT");  
  148.                 Bt_Min1.Visible = true;  
  149.                 ImageButton Bt_plus1 = (ImageButton)row.Cells[0].FindControl("PluseBT");  
  150.                 Bt_plus1.Visible = false;  
  151.             }  
  152.   
  153.         }  
  154.         if (e.CommandName == "_Hide")  
  155.         {  
  156.             int index = Convert.ToInt32(e.CommandArgument);  
  157.             GridViewRow row = GridView1.Rows[index];  
  158.             int G_Count = GridView1.Rows.Count;  
  159.             for (int i = index + 1; i < G_Count; i++)  
  160.             {  
  161.                 if (GridView1.Rows[i].Cells[1].Text == " ")  
  162.                 {  
  163.                     GridView1.Rows[i].Visible = false;  
  164.                 }  
  165.                 else  
  166.                 {  
  167.                     ImageButton Bt_Min = (ImageButton)row.Cells[0].FindControl("MinBT");  
  168.                     Bt_Min.Visible = false;  
  169.                     ImageButton Bt_plus = (ImageButton)row.Cells[0].FindControl("PluseBT");  
  170.                     Bt_plus.Visible = true;  
  171.                     break;  
  172.   
  173.                 }  
  174.                 ImageButton Bt_Min1 = (ImageButton)row.Cells[0].FindControl("MinBT");  
  175.                 Bt_Min1.Visible = false;  
  176.                 ImageButton Bt_plus1 = (ImageButton)row.Cells[0].FindControl("PluseBT");  
  177.                 Bt_plus1.Visible = true;  
  178.             }  
  179.   
  180.         }  
  181.           
  182.     }  
  183. }  
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Data;using System.Data.SqlClient;using System.Web.UI.HtmlControls;public partial class Default2 : System.Web.UI.Page{    public string connStr = System.Configuration.ConfigurationManager.AppSettings["connStr"];    protected void Page_Load(object sender, EventArgs e)    {        if (!IsPostBack)        {            using (SqlConnection conn = new SqlConnection(connStr))            {                conn.Open();                string sql = "SELECT ParentName,ParentID,dateof FROM TreeParent tp ";                SqlCommand cmd = new SqlCommand(sql, conn);                DataTable dt = new DataTable();                dt.Columns.Add(new DataColumn("ParentID", typeof(string)));                dt.Columns.Add(new DataColumn("ChildID", typeof(string)));                dt.Columns.Add(new DataColumn("Name", typeof(string)));                dt.Columns.Add(new DataColumn("Dateof", typeof(string)));                SqlDataReader sdr = cmd.ExecuteReader();                while (sdr.Read())                {                    DataRow dr = dt.NewRow();                    int pID = Convert.ToInt32(sdr["ParentID"]);                    dr["ParentID"] = (sdr["ParentID"]);                    dr["ChildID"] = null;                    dr["Name"] = sdr["ParentName"];                    dr["Dateof"] = sdr["Dateof"];                    dt.Rows.Add(dr);                    DataTable myDT = GenerateDT(pID.ToString());                    foreach (DataRow drChild in myDT.Rows)                    {                        DataRow drChildDT = dt.NewRow();                        drChildDT["ChildID"] = drChild["ChildID"];                        drChildDT["Name"] = drChild["ChildName"];                        drChildDT["Dateof"] = drChild["Dateof"];                        dt.Rows.Add(drChildDT);                    }                }                sdr.Close();                GridView1.DataSource = dt;                GridView1.DataBind();            }        }    }    protected DataTable GenerateDT(string ParentID)    {        using (SqlConnection conn = new SqlConnection(connStr))        {            conn.Open();            DataTable dt = new DataTable();            dt.Columns.Add(new DataColumn("ChildName", typeof(string)));            dt.Columns.Add(new DataColumn("ChildID", typeof(string)));            dt.Columns.Add(new DataColumn("Dateof", typeof(string)));            string sql = "SELECT childID,childName,dateof FROM TreeChild tc where tc.ParentID=" + ParentID;            SqlCommand cmd = new SqlCommand(sql, conn);            SqlDataReader sdr = cmd.ExecuteReader();            while (sdr.Read())            {                DataRow dr = dt.NewRow();                dr["ChildName"] = sdr["childName"];                dr["ChildID"] = sdr["ChildID"];                dr["Dateof"] = sdr["Dateof"];                dt.Rows.Add(dr);            }            sdr.Close();            return dt;        }    }    protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)    {        if (e.Row.RowType == DataControlRowType.Header)        {            e.Row.Cells[1].Visible = false;            e.Row.Cells[2].Visible = false;        }        if (e.Row.RowType == DataControlRowType.DataRow)        {            e.Row.Cells[1].Visible = false;            e.Row.Cells[2].Visible = false;            ImageButton btnMin = (ImageButton)e.Row.Cells[0].FindControl("MinBT");            btnMin.CommandArgument = e.Row.RowIndex.ToString();            ImageButton btnAdd = (ImageButton)e.Row.Cells[0].FindControl("PluseBT");            btnAdd.CommandArgument = e.Row.RowIndex.ToString();        }    }    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)    {        if (e.Row.RowType == DataControlRowType.DataRow)        {            string ShowHide = e.Row.Cells[1].Text;            ShowHide = ShowHide.Replace(" ", "");            ShowHide = ShowHide.Replace(" ","");            if (ShowHide.Trim().Length == 0)            {                ImageButton btnMin = (ImageButton)e.Row.Cells[0].FindControl("MinBT");                btnMin.Visible = false;                ImageButton btnAdd = (ImageButton)e.Row.Cells[0].FindControl("PluseBT");                btnAdd.Visible = false;                HtmlImage Line = (HtmlImage)e.Row.Cells[0].FindControl("Line");                Line.Visible = true;            }            else            {                HtmlImage Line = (HtmlImage)e.Row.Cells[0].FindControl("Line");                Line.Visible = false;            }        }    }    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)    {               if (e.CommandName == "_Show")        {            int index = Convert.ToInt32(e.CommandArgument);            GridViewRow row = GridView1.Rows[index];            int G_Count = GridView1.Rows.Count;            for (int i = index + 1; i < G_Count; i++)            {                if (GridView1.Rows[i].Cells[1].Text == " ")                {                    GridView1.Rows[i].Visible = true;                }                else                {                    ImageButton Bt_Min = (ImageButton)row.Cells[0].FindControl("MinBT");                    Bt_Min.Visible = true;                    ImageButton Bt_plus = (ImageButton)row.Cells[0].FindControl("PluseBT");                    Bt_plus.Visible = false;                    break;                }                ImageButton Bt_Min1 = (ImageButton)row.Cells[0].FindControl("MinBT");                Bt_Min1.Visible = true;                ImageButton Bt_plus1 = (ImageButton)row.Cells[0].FindControl("PluseBT");                Bt_plus1.Visible = false;            }        }        if (e.CommandName == "_Hide")        {            int index = Convert.ToInt32(e.CommandArgument);            GridViewRow row = GridView1.Rows[index];            int G_Count = GridView1.Rows.Count;            for (int i = index + 1; i < G_Count; i++)            {                if (GridView1.Rows[i].Cells[1].Text == " ")                {                    GridView1.Rows[i].Visible = false;                }                else                {                    ImageButton Bt_Min = (ImageButton)row.Cells[0].FindControl("MinBT");                    Bt_Min.Visible = false;                    ImageButton Bt_plus = (ImageButton)row.Cells[0].FindControl("PluseBT");                    Bt_plus.Visible = true;                    break;                }                ImageButton Bt_Min1 = (ImageButton)row.Cells[0].FindControl("MinBT");                Bt_Min1.Visible = false;                ImageButton Bt_plus1 = (ImageButton)row.Cells[0].FindControl("PluseBT");                Bt_plus1.Visible = true;            }        }            }}

前台代码如下：

[csharp] view plaincopyprint?
  1. <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>  
  2.   
  3. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
  4.   
  5. <html xmlns="http://www.w3.org/1999/xhtml">  
  6. <head runat="server">  
  7.     <title></title>  
  8. </head>  
  9. <body>  
  10.     <form id="form1" runat="server">  
  11.     <div>  
  12.       
  13.         <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"   
  14.             CellPadding="4" ForeColor="#333333" GridLines="None"   
  15.             onrowcommand="GridView1_RowCommand" onrowcreated="GridView1_RowCreated"   
  16.             onrowdatabound="GridView1_RowDataBound" Width="456px">  
  17.             <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />  
  18.             <Columns>  
  19.                 <asp:TemplateField HeaderText="操作">  
  20.                     <ItemTemplate>  
  21.                         <asp:ImageButton ID="PluseBT" runat="server" Visible="false" CommandName="_Show" BackColor="White" BorderStyle="none" ImageUrl="~/plus.gif" />  
  22.                         <asp:ImageButton ID="MinBT" runat="server" CommandName="_Hide" BackColor="White" BorderStyle="none" ImageUrl="~/minus.gif" />  
  23.                         <img id="Line" runat="server" visible="false" src="~/line.gif"/>  
  24.                     </ItemTemplate>  
  25.                 </asp:TemplateField>  
  26.                 <asp:BoundField DataField="ParentID" HeaderText="Parent Id" />  
  27.                 <asp:BoundField DataField="ChildId" HeaderText="Child Id" />  
  28.                 <asp:BoundField DataField="Name" HeaderText="名称" />  
  29.                 <asp:BoundField DataField="Dateof" HeaderText="时间" />  
  30.             </Columns>  
  31.   
  32.             <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />  
  33.             <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />  
  34.             <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />  
  35.             <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />  
  36.             <EditRowStyle BackColor="#999999" />  
  37.             <AlternatingRowStyle BackColor="White" ForeColor="#284775" />  
  38.         </asp:GridView>  
  39.       
  40.     </div>  
  41.     </form>  
  42. </body>  
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