asp.net - gridview 中的 asp.net 下拉列表

Question

我在一个带有gridview 的asp.net 网站上工作。

gridview 具有来自 sql 数据库的数据。

像：

Cuntry----Name
USA--------John
England----Frank

...

数据像这样加载到gridview中：

SqlCommand cmd;
        cmd = new SqlCommand();
        cmd.Connection = sqlConn;
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.CommandText = "sp_loadData";
        sqlConn.Open();

        dr = cmd.ExecuteReader();

        DataTable dt = new DataTable();
        dt.Load(dr);
        GridView1.DataSource = dt;
        GridView1.DataBind();

所以，在名称列中，我想要一个下拉列表。我希望下拉列表具有所选数据库中的相应值。

我怎样才能做到这一点？

谢谢

Answer 1

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" 
  OnRowDataBound="GridView1_RowDataBound">    
  <Columns>
  <asp:TemplateField HeaderText="Country">
    <ItemTemplate>
      <asp:DropDownList Width="50" runat="server" id="ddlCountry" AutoPostBack="true">
      </asp:DropDownList> 
    </ItemTemplate>
  </asp:TemplateField>
</asp:GridView>

在代码隐藏中

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    //Checking whether the Row is Data Row
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //Finding the Dropdown control.
        Control ctrl = e.Row.FindControl("ddlCountry");
        if (ctrl != null)
        {
            DropDownList dd = ctrl as DropDownList;
            //Here Bind with country list
            dd.DataSource = lst;
            //Put here the object properties name
            dd.DataValueField = "idCountry";
            dd.DataTextField = "nameCountry";
            dd.DataBind();
            //Here add the code to select the current user country in the list
            int idUserCountry = 10;
            dd.Items.FindByValue(idUserCountry).Selected = true;

        }
    }
}