dropdownlist和GridView的简单使用

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            this.BindToDropDownList();//绑定DropDownList
            string id = this.DropDownList1.SelectedValue;//获取当前DropDownList的value值
            this.BindToGridView(id); //绑定GridView
        }
    }

    //绑定到 DropDownList
    private void BindToDropDownList()
    {
        SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["SqlConn1"]);
        SqlDataAdapter sda = new SqlDataAdapter("select ProductID,ProductName from products", conn);
        DataSet ds = new DataSet();
        sda.Fill(ds);
        this.DropDownList1.DataSource = ds;
        this.DropDownList1.DataTextField = "ProductName";
        this.DropDownList1.DataValueField = "ProductID";
        this.DropDownList1.DataBind();
    }
    //绑定到GridView
    private void BindToGridView(string id)
    {
        this.GridView1.AllowPaging=true;//允许分页
        this.GridView1.AllowSorting = true;//允许排序
        SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["SqlConn1"]);
        SqlDataAdapter sda1 = new SqlDataAdapter("select * from [Order Details]where ProductID=" + id, conn);
        DataSet ds = new DataSet();
        sda1.Fill(ds);

        //如果不排序用下面的绑定方法就可以了
        //this.GridView1.DataSource = ds;
        //this.GridView1.DataBind();

        //如果要排序采用下面的梆定方法
        DataView dv = ds.Tables[0].DefaultView;
        if (ViewState["sortexpression"] != null)
        {
            dv.Sort = ViewState["sortexpression"].ToString() + " " + ViewState["sortdirection"].ToString();
        }
        this.GridView1.DataSource = dv;
        this.GridView1.DataBind();
    }
    //回调数据库
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        string id = this.DropDownList1.SelectedValue;//获取当前DropDownList的value值
        this.BindToGridView(id);
    }
    //分页
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        string id = this.DropDownList1.SelectedValue;//获取当前DropDownList的value值
        this.GridView1.PageIndex = e.NewPageIndex;
        this.BindToGridView(id);
    }
    //行变色
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if(e.Row.RowType==DataControlRowType.DataRow)
        {
            e.Row.Attributes.Add("onMouseOver", "SetNewColor(this);");//结合前台html代码
            e.Row.Attributes.Add("onMouseOut", "SetOldColor(this);");
            e.Row.Attributes["style"] = "Cursor:hand";

        }
    }
    protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
    {
        string id = this.DropDownList1.SelectedValue;//获取当前DropDownList的value值
        ViewState["sortexpression"] = e.SortExpression;
        if (ViewState["sortdirection"] == null)
        {
            ViewState["sortdirection"] = "asc";
        }
        else
        {
            if (ViewState["sortdirection"].ToString() == "asc")
            {
                ViewState["sortdirection"] = "desc";
            }
            else
            {
                ViewState["sortdirection"] = "asc";

}
}

this.BindToGridView(id);//重新绑定
}
}

前台Javascript:

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/zhouyanlong/archive/2006/09/27/1295392.aspx