GridView绑定DropdownList

Question

我现在做的是在页面加载的时候，就绑定DropdownList，然后也可以更新，可是我想要的效果是加载的时候，显示的是一个label，点编辑的时候这列才显示DropdownList,我现在这个如果显示的时候是label就出错。请问怎么做，我的代码如下：
------------------------------------------
HTML
<asp:GridView ID="GridView1" runat="server" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowUpdating"GridView1_RowUpdating" OnRowEditing="GridView1_RowEditing" AutoGenerateColumns="False" DataKeyNames="EpId" OnRowDataBound="GridView1_RowDataBound">
  <Columns>
    <asp:TemplateField HeaderText="所属大类" SortExpression="goodsType">
      <EditItemTemplate>
     <asp:DropDownList ID="DropDownList1"runat="server"></asp:DropDownList>
      </EditItemTemplate>
      <ItemTemplate>
       <asp:DropDownList ID="DropDownList1"  runat="server"/>
       </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="操作" ShowHeader="False">
    <EditItemTemplate>
     <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="True" CommandName="Update"Text="更新"></asp:LinkButton>
      <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Cancel"
      Text="取消"></asp:LinkButton>
       </EditItemTemplate>
       <ItemTemplate>
       <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Edit"Text="编辑"></asp:LinkButton>
       </ItemTemplate>
       </asp:TemplateField>
       </Columns>
      </asp:GridView>
------------------------------------------------------------
CS代码中：
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            DropDownList goodsType = (DropDownList)e.Row.FindControl("DropDownList1");
            con = new SqlConnection(ConfigurationManager.ConnectionStrings["TestProviderConnectionString"].ConnectionString);
            DataSet ds = new DataSet();
            SqlDataAdapter da = new SqlDataAdapter("select * from goodsType",con);
            da.Fill(ds,"gt");
            goodsType.DataSource = ds.Tables["gt"];
            goodsType.DataTextField = "goodsType";
            goodsType.DataValueField = "goodsId";
            goodsType.DataBind();
        }    }

Answer 1

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {

Answer 2

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
      GridView gv = (GridView)sender;
      if(gv.Rows.Count ==0)
       {
             return;
         }
       DropDownList ddl = (DropDownList)gv.Rows[gv.Rows.Conut-1]FindControl("DropDownList1");
       if(ddl != null)
        {
                con = new SqlConnection(ConfigurationManager.ConnectionStrings["TestProviderConnectionString"].ConnectionString);
            DataSet ds = new DataSet();
            SqlDataAdapter da = new SqlDataAdapter("select * from goodsType",con);
            da.Fill(ds,"gt");
            goodsType.DataSource = ds.Tables["gt"];
            goodsType.DataTextField = "goodsType";
            goodsType.DataValueField = "goodsId";
            goodsType.DataBind();           
           }拿去试试``````

Answer 3

就用GridView自带的编辑都可以用``

Answer 4

wuhan_dotnet(刚刚学asp.net^~^) ( ) 信誉：100
=================================================
你的代码我用了，DropDownList ddl = (DropDownList)gv.Rows[gv.Rows.Conut-1]FindControl("DropDownList1");这句出错，然后我给改成
DropDownList goodsType = (DropDownList)e.Row.FindControl("DropDownList1");
可以使用了，可是点编辑的时候DropDownList没有数据

Answer 5

谢了，我搞定了，我把
GridView gv = (GridView)sender;
      if(gv.Rows.Count ==0)
       {
             return;
         }
去掉就好了，谢谢，结贴