gridView总结

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1.GridView无代码分页排序
    
1.1.AllowSorting设为True,aspx代码中是AllowSorting="True"
    
1.2..默认1页10条,如果要修改每页条数,修改PageSize即可,在aspx代码中是PageSize="12"
    
1.3.默认的是单向排序的,右击GridView弹出“属性”,选择AllowSorting为True即可。

2.GridView选中,编辑,取消,删除
        
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    
{  
        GridView1.EditIndex 
= e.NewEditIndex;
        bind();
    }


//删除
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    
{
        
string sqlstr = "delete from 表 where id='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";                             

        bind();
    }


//更新
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    
{
        sqlcon 
= new SqlConnection(strCon);
        
string sqlstr = "update 表 set 字段1='"
            
+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',字段2='"
            
+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString().Trim() + "',字段3='"
            
+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where id='" 
            
+ GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
     
        GridView1.EditIndex 
= -1;
        bind();
    }

//取消
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    
{
        GridView1.EditIndex 
= -1;
        bind();
    }


//绑定
    public void bind()
    
{
     
        GridView1.DataSource 
= myds;
        GridView1.DataKeyNames 
= new string[] "id" };//主键
        GridView1.DataBind();

    }


3.GridView正反双向排序

        
public partial class Default3 : System.Web.UI.Page
        
{
            
protected void Page_Load(object sender, EventArgs e)
            
{
                
if (!IsPostBack)
                
{
                    ViewState[
"SortOrder"= "身份证号码";
                    ViewState[
"OrderDire"= "ASC";
                    bind();
                }

            }

            
protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
            
{
                
string sPage = e.SortExpression;
                
if (ViewState["SortOrder"].ToString() == sPage)
                
{
                    
if (ViewState["OrderDire"].ToString() == "Desc")
                        ViewState[
"OrderDire"= "ASC";
                    
else
                        ViewState[
"OrderDire"= "Desc";
                }

                
else
                
{
                    ViewState[
"SortOrder"= e.SortExpression;
                }

                bind();
            }


            
public void bind()
            
{
                myda.Fill(myds, 
"飞狐工作室");
                DataView view 
= myds.Tables["飞狐工作室"].DefaultView;
                
string sort = (string)ViewState["SortOrder"+ " " + (string)ViewState["OrderDire"];
                view.Sort 
= sort;
                GridView1.DataSource 
= view;
                GridView1.DataBind();
            }

        }

4.GridView和下拉菜单DropDownList结合
    
protected void Page_Load(object sender, EventArgs e)
    
{
        DropDownList ddl;
        
if (!IsPostBack)
        
{
            
string sqlstr = "select top 5 * from 飞狐工作室";
            sqlcon 
= new SqlConnection(strCon);
            SqlDataAdapter myda 
= new SqlDataAdapter(sqlstr, sqlcon);
            DataSet myds 
= new DataSet();
            sqlcon.Open();
            myda.Fill(myds, 
"飞狐工作室");
            GridView1.DataSource 
= myds;
            GridView1.DataBind();
            
for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
            
{
                DataRowView mydrv 
= myds.Tables["飞狐工作室"].DefaultView[i];
                
if (Convert.ToString(mydrv["员工性别"]).Trim() == "True")
                
{
                    ddl 
= (DropDownList)GridView1.Rows[i].FindControl("DropDownList1");
                    ddl.SelectedIndex 
= 0;
                }

                
if (Convert.ToString(mydrv["员工性别"]).Trim() == "False")
                
{
                    ddl 
= (DropDownList)GridView1.Rows[i].FindControl("DropDownList1");
                    ddl.SelectedIndex 
= 1;
                }

            }

            sqlcon.Close();
        }

    }

    
public SqlDataReader ddlbind()
    
{
        
string sqlstr = "select distinct 员工性别 from 飞狐工作室";
        sqlcon 
= new SqlConnection(strCon);
        SqlCommand sqlcom 
= new SqlCommand(sqlstr, sqlcon);
        sqlcon.Open();
        
return sqlcom.ExecuteReader();
    }

5.GridView和CheckBox结合

//checkBox在外部
 protected void CheckBox2_CheckedChanged(object sender, EventArgs e)
    
{
        
for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
        
{
            CheckBox cbox 
= (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");
            
if (CheckBox2.Checked == true)
            
{
                cbox.Checked 
= true;
            }

            
else
            
{
                cbox.Checked 
= false;
            }

        }

    }

    
//遍例删除
      protected void Button2_Click(object sender, EventArgs e)
    
{
 
        
for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
        
{
            CheckBox cbox 
= (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");
            
if (cbox.Checked == true)
            
{
               
string id =  GridView1.DataKeys[i].Value;
         
            }

        }
        
6.GridView实现删除时弹出确认对话框
 
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
      
{
        
//如果是绑定数据行    ////当有编辑列时,避免出错,要加的RowState判断 
        if (e.Row.RowType == DataControlRowType.DataRow)
        
{
            
if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate)
            
{
                ((LinkButton)e.Row.Cells[
6].Controls[0]).Attributes.Add("onclick""javascript:return confirm('你确认要删除:"" + e.Row.Cells[1].Text + ""吗?')");
            }

        }

    }

7.GridView实现自动编号
    在后台的GridView1_RowDataBound()方法添加代码,最后代码如下所示:
    
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    
{
        
//如果是绑定数据行 //清清月儿http://blog.csdn.net/21aspnet 
        if (e.Row.RowType == DataControlRowType.DataRow)
        
{
            
////鼠标经过时,行背景色变 
            e.Row.Attributes.Add("onmouseover""this.style.backgroundColor='#E6F5FA'");
            
////鼠标移出时,行背景色变 
            e.Row.Attributes.Add("onmouseout""this.style.backgroundColor='#FFFFFF'");
        }

        
if (e.Row.RowIndex != -1)
        
{
            
int id = e.Row.RowIndex + 1;
            e.Row.Cells[
0].Text = id.ToString();
        }

    }

注意这时最好把前台的第一列的表头该为“编号”,因为以前的第一列被“吃掉”了。

8.GridView实现自定义时间货币等字符串格式
    解决方法:
    在asp.net 
2.0中,如果要在绑定列中显示比如日期格式等,如果用下面的方法是显示不了的
    
<asp :BoundField DataField="CreationDate" 
    DataFormatString
="{0:M-dd-yyyy}" 
    HeaderText
="CreationDate" />

    主要是由于htmlencode属性默认设置为true,已防止XSS攻击,安全起见而用的,所以,可以有以下两种方法解决
    
1
        
<asp :GridView ID="GridView1" runat="server">
        
<columns>
        
<asp :BoundField DataField="CreationDate" 
        DataFormatString
="{0:M-dd-yyyy}" 
        HtmlEncode
="false"
        HeaderText
="CreationDate" />
        
</columns>
        
</asp>

        将htmlencode设置为false即可
    
2.另外的解决方法为,使用模版列 
    
<asp :GridView ID="GridView3" runat="server" >
    
<columns>
    
<asp :TemplateField HeaderText="CreationDate" >
    
<edititemtemplate>
    
<asp :Label ID="Label1" runat="server" 
    Text
='<%# Eval("CreationDate", "{0:M-dd-yyyy}") %>'>
    
</asp>
    
</edititemtemplate>
    
<itemtemplate>
    
<asp :Label ID="Label1" runat="server" 
    Text
=<%# Bind("CreationDate""{0:M-dd-yyyy}"%>'>
    </asp>
    
</itemtemplate>
    
</asp>
    
</columns>
    
</asp>
    附录
-常用格式化公式:
    
{0:C}  货币;
    
{0:D4}由0填充的4个字符宽的字段中显示整数;
    
{0:000.0}四舍五入小数点保留第几位有效数字;
    
{0:N2}小数点保留2位有效数字;{0:N2}%   小数点保留2位有效数字加百分号;
    
{0:D}长日期;{0:d}短日期;{0:yy-MM-dd}   例如07-3-25;;{0:yyyy-MM-dd}  例如2007-3-25
9 .GridView实现用“...”代替超长字符串
    
public void bind()
    
{
        GridView1.DataSource 
= myds;
        GridView1.DataKeyNames 
= new string[] "身份证号码" };
        GridView1.DataBind();
        
for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
        
{
            DataRowView mydrv;
            
string gIntro;
            
if (GridView1.PageIndex == 0)
            
{
                mydrv 
= myds.Tables[0].DefaultView[i];
                gIntro 
= Convert.ToString(mydrv["家庭住址"]);
                GridView1.Rows[i].Cells[
3].Text = SubStr(gIntro, 2);
            }

            
else
            
{
                mydrv 
= myds.Tables["飞狐工作室"].DefaultView[i + (5 * GridView1.PageIndex)];
                gIntro 
= Convert.ToString(mydrv["家庭住址"]);
                GridView1.Rows[i].Cells[
3].Text = SubStr(gIntro, 2);
            }

        }

    }


    调用的方法:
    
public string SubStr(string sString, int nLeng)
    
{
        
if (sString.Length <= nLeng)
        
{
            
return sString;
        }

        
string sNewStr = sString.Substring(0, nLeng);
        sNewStr 
= sNewStr + "...";
        
return sNewStr;
    }

10.GridView一般换行与强制换行
        gridview里有一列绑定的数据很长,显示的时候在一行里面显示,页面拉得很宽。
    原因是连续英文段为一个整体导致的,在RowDataBound中添加上了一句e.Row.Cells[
2].Style.Add("word-break""break-all")就可以。

    如果要给所有的列增加此属性:
     
protected void Page_Load(object sender, EventArgs e)
        
{
            
//正常换行
            GridView1.Attributes.Add("style""word-break:keep-all;word-wrap:normal");
            
//下面这行是自动换行
            GridView1.Attributes.Add("style""word-break:break-all;word-wrap:break-word");
            
if (!IsPostBack)
            
{
                 bind();
//调用数据绑定即可
            }

        }

    总之:善用CSS的word
-break:break-all;word-wrap:break-word属性即可,这个属性是通用的对于顽固的南换行问题都可以解决,不局限于GridView。

    
11.GridView显示隐藏某一列
    双击CheckBox1,在CheckedChanged方法里写上代码,最后代码如下:
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
    
{
         GridView1.Columns[
3].Visible=! GridView1.Columns[3].Visible;
         Response.Write(
"GridView1的第4列现在的显示隐藏状态是:"+GridView1.Columns[3].Visible.ToString());
    }

    
12.GridView弹出新页面/弹出新窗口
    方案二:精确控制弹出窗口大小位置
<asp:HyperLinkColumn DataNavigateUrlField="EmployeeID" DataNavigateUrlFormatString="javascript:varwin=window.open('detail.aspx?ID={0}',null,'width=300,height=200');window.Close();"
       DataTextField
="LastName" HeaderText="LastName"></asp:HyperLinkColumn>

使用的是结合javascript的window.open方法,关于window.open的参数网上有很多帖子,本站也有许多参考


13.GridView固定表头(不用javascript只用CSS,2行代码,很好用)
    
<head runat="server">
    
<title>GridView固定表头 清清月儿http://blog.csdn.net/21aspnet </title>
        <style> 
.Freezing 
   

    
   position:relative ; 
   table
-layout:fixed;
   top:expression(
this.offsetParent.scrollTop);   
   z
-index: 10;
   }
 

.Freezing th
{text-overflow:ellipsis;overflow:hidden;white-space: nowrap;padding:2px;}
</style> 
</head>
...
 
<div style="overflow-y: scroll; height: 200px;width:300px" id="dvBody">
 
<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" CssClass="Freezing"/>
 
</div>
 用法:CSS设如上的样式,HeaderStyle加CssClass
="Freezing,套住GridView的Div设置高度宽度 <div style="overflow-y: scroll; height: 200px;width:200px" >
 
14.GridView合并表头多重表头无错完美版(以合并3列3行举例)
        
//这里就是解决方案
    protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
    
{
        
switch (e.Row.RowType)
        
{
            
case DataControlRowType.Header:
                
//第一行表头
                TableCellCollection tcHeader = e.Row.Cells;
                tcHeader.Clear();
                tcHeader.Add(
new TableHeaderCell());
                tcHeader[
0].Attributes.Add("rowspan""3"); //跨Row
                tcHeader[0].Attributes.Add("bgcolor""white");
                tcHeader[
0].Text = "";
                tcHeader.Add(
new TableHeaderCell());
                
//tcHeader[1].Attributes.Add("bgcolor", "Red");
                tcHeader[1].Attributes.Add("colspan""6"); //跨Column
                tcHeader[1].Text = "全部信息</th></tr><tr>";

                
//第二行表头
                tcHeader.Add(new TableHeaderCell());
                tcHeader[
2].Attributes.Add("bgcolor""DarkSeaGreen");
                tcHeader[
2].Text = "身份证号码";
                tcHeader.Add(
new TableHeaderCell());
                tcHeader[
3].Attributes.Add("bgcolor""LightSteelBlue");
                tcHeader[
3].Attributes.Add("colspan""2");
                tcHeader[
3].Text = "基本信息";
                tcHeader.Add(
new TableHeaderCell());
                tcHeader[
4].Attributes.Add("bgcolor""DarkSeaGreen");
                tcHeader[
4].Text = "福利";
                tcHeader.Add(
new TableHeaderCell());
                tcHeader[
5].Attributes.Add("bgcolor""LightSteelBlue");
                tcHeader[
5].Attributes.Add("colspan""2");
                tcHeader[
5].Text = "联系方式</th></tr><tr>";

                
//第三行表头
                tcHeader.Add(new TableHeaderCell());
                tcHeader[
6].Attributes.Add("bgcolor""Khaki");
                tcHeader[
6].Text = "身份证号码";
                tcHeader.Add(
new TableHeaderCell());
                tcHeader[
7].Attributes.Add("bgcolor""Khaki");
                tcHeader[
7].Text = "姓名";
                tcHeader.Add(
new TableHeaderCell());
                tcHeader[
8].Attributes.Add("bgcolor""Khaki");
                tcHeader[
8].Text = "出生日期";
                tcHeader.Add(
new TableHeaderCell());
                tcHeader[
9].Attributes.Add("bgcolor""Khaki");
                tcHeader[
9].Text = "薪水";
                tcHeader.Add(
new TableHeaderCell());
                tcHeader[
10].Attributes.Add("bgcolor""Khaki");
                tcHeader[
10].Text = "家庭住址";
                tcHeader.Add(
new TableHeaderCell());
                tcHeader[
11].Attributes.Add("bgcolor""Khaki");
                tcHeader[
11].Text = "邮政编码";
                
break;
        }

    }

}


15.GridView突出显示某一单元格(例如金额低于多少,分数不及格等)
    
protected void bind()
    
{
               
for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
            
{
                DataRowView mydrv 
= myds.Tables["飞狐工作室"].DefaultView[i];
                
string score = Convert.ToString(mydrv["起薪"]);
                
if (Convert.ToDouble(score) < 34297.00)//大家这里根据具体情况设置可能ToInt32等
                {
                    GridView1.Rows[i].Cells[
4].BackColor = System.Drawing.Color.Red;
                }

            }

      }

16.GridView加入自动求和求平均值小计(例如在购物车中,总计,平均)
    
private double sum = 0;//取指定列的数据和,你要根据具体情况对待可能你要处理的是int
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        
{
            
if (e.Row.RowIndex >= 0)
            
{
            
//在第7列上运算
                sum += Convert.ToDouble(e.Row.Cells[6].Text);
            }

            
else if (e.Row.RowType == DataControlRowType.Footer)
            
{
                e.Row.Cells[
5].Text = "总薪水为:";
                e.Row.Cells[
6].Text = sum.ToString();
                e.Row.Cells[
3].Text = "平均薪水为:";
                e.Row.Cells[
4].Text = ((int)(sum / GridView1.Rows.Count)).ToString();
                
            }

        }

17.GridView数据导入Excel/Excel数据读入GridView
    解决方案:
        页面增加一个按钮,单击事件添加如下方法:
        
protected void Button1_Click(object sender, EventArgs e)
            
{
                Export(
"application/ms-excel""学生成绩报表.xls");
            }


            
private void Export(string FileType, string FileName)
            
{
                Response.Charset 
= "GB2312";
                Response.ContentEncoding 
= System.Text.Encoding.UTF7;
                Response.AppendHeader(
"Content-Disposition""attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
                Response.ContentType 
= FileType;
                
this.EnableViewState = false;
                StringWriter tw 
= new StringWriter();
                HtmlTextWriter hw 
= new HtmlTextWriter(tw);
                GridView1.RenderControl(hw);
                Response.Write(tw.ToString());
                Response.End();
            }

        
//如果没有下面方法会报错类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标记内
            public override void VerifyRenderingInServerForm(Control control)
            
{
            }

        还有由于是文件操作所以要引入名称空间IO和Text
读取Excel数据的代码:这个很简单的
private DataSet CreateDataSource()
    
{
        
string strCon;
        strCon 
= "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("excel.xls"+ "; Extended Properties=Excel 8.0;";
        OleDbConnection olecon 
= new OleDbConnection(strCon);
        OleDbDataAdapter myda 
= new OleDbDataAdapter("SELECT * FROM [Sheet1$]", strCon);
        DataSet myds 
= new DataSet();
        myda.Fill(myds);
        
return myds;
    }

    
protected void Button1_Click(object sender, EventArgs e)
    
{
        GridView1.DataSource 
= CreateDataSource();
        GridView1.DataBind();
    }


18.鼠标移到GridView某一行时改变该行的背景色方法一
    
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    
{
        
int i;
        
//执行循环,保证每条数据都可以更新
        for (i = 0; i < GridView1.Rows.Count; i++)
        
{
            
//首先判断是否是数据行
            if (e.Row.RowType == DataControlRowType.DataRow)
            
{
                
//当鼠标停留时更改背景色
                e.Row.Attributes.Add("onmouseover""c=this.style.backgroundColor;this.style.backgroundColor='#00A9FF'");
                
//当鼠标移开时还原背景色
                e.Row.Attributes.Add("onmouseout""this.style.backgroundColor=c");
            }

        }


    }

鼠标移到GridView某一行时改变该行的背景色方法二
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    
{
     
        
////执行循环,保证每条数据都可以更新
        //for (int i = 0; i < GridView1.Rows.Count; i++)
        
//{
        
//    //首先判断是否是数据行
        
//    if (e.Row.RowType == DataControlRowType.DataRow)
        
//    {
        
//        //当鼠标停留时更改背景色
        
//        e.Row.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#00A9FF'");
        
//        //当鼠标移开时还原背景色
        
//        e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c");
        
//    }
        
//}
        
//如果是绑定数据行 
        if (e.Row.RowType == DataControlRowType.DataRow)
        
{
            
//鼠标经过时,行背景色变 
            e.Row.Attributes.Add("onmouseover""this.style.backgroundColor='#E6F5FA'");
            
//鼠标移出时,行背景色变 
            e.Row.Attributes.Add("onmouseout""this.style.backgroundColor='#FFFFFF'");
        }


    }


 
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