GridView与DropDownList控件的结合

      一个简单的例子说明GridView与DropDownList结合的用法。

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4"
                ForeColor="#333333" GridLines="None" AllowSorting="True" PageSize="6">
                <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
                <Columns>
                    <asp:BoundField DataField="UserID" HeaderText="用户ID" ReadOnly="True"  />
                    <asp:BoundField DataField="User_Nm" HeaderText="用户姓名"/>
                    <asp:TemplateField HeaderText="员工性别">
                        <ItemTemplate>
                            <asp:DropDownList ID="DropDownList1" runat="server" DataSource='<%# ddlBind() %>'
                                DataValueField="User_Sex" DataTextField="User_Sex">
                            </asp:DropDownList>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:BoundField DataField="User_Address" HeaderText="家庭住址" />
                </Columns>
                <RowStyle ForeColor="#008066" />
                <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
                <PagerStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
                <HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
            </asp:GridView>

using System;
using System.Data;
using System.Data.SqlClient;
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;

public partial class GridView_DropDownList : System.Web.UI.Page
{
    SqlConnection sqlcon;
    string strCon = "Data Source=.\\SQL2005;DataBase=Users;Uid=sa;Pwd=123";

    protected void Page_Load(object sender, EventArgs e)
    {
        //DataTextFiled 获取或设置为列表项提供文本内容的数据源字段
        //DataValueField获取或设置为各列表项提供值的数据源字段
        if (!IsPostBack)
        {
            DropDownList ddl;
            string sqlstr = "SELECT * FROM Users";
            sqlcon = new SqlConnection(strCon);
            SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
            DataSet myds = new DataSet();
            sqlcon.Open();
            myda.Fill(myds, "AlLUser");
            GridView1.DataSource = myds;
            GridView1.DataBind();

            for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
            {
                DataRowView mydrv = myds.Tables["ALLUser"].DefaultView[i];
                if (Convert.ToString(mydrv["User_Sex"]).Trim() == "男")
                {
                    ddl = (DropDownList)GridView1.Rows[i].FindControl("DropDownList1");
                    ddl.SelectedIndex = 0;
                    ddl.SelectedItem.Text = "男";
                }
                else if (Convert.ToString(mydrv["User_Sex"]).Trim() == "女")
                {
                    ddl = (DropDownList)GridView1.Rows[i].FindControl("DropDownList1");
                    ddl.SelectedIndex = 1;
                    ddl.SelectedItem .Text = "女";
                }
            }
            sqlcon.Close();
        }
    }

    public SqlDataReader ddlBind()
    {
        string sqlstr = "SELECT DISTINCT User_Sex FROM Users";
        sqlcon = new SqlConnection(strCon);
        SqlCommand sqlcom = new SqlCommand(sqlstr, sqlcon);
        sqlcon.Open();
        return sqlcom.ExecuteReader();
    }
}