GridView绑—ropdownList
我现在做的是在页面加载的时候，就绑—ropdownList，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：
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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>
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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();
}

}

[解决办法]
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``````