gridview中dropdownlist的赋值问题
我在gridview中的模板列放了个dropdownlist 现在想从数据库读出数据 其中一个属性值要赋值给dropdownlist 并且实现在gridview的updating时 dropdownlist 是激活的 不更新时是不激活的 求大神指导
updating事件

protected void GrvRepairMailbox_RowUpdating(object sender, GridViewUpdateEventArgs e)

        {

            //this.GrvRepairMailbox.Rows[e.RowIndex].Cells[7].Controls[0]

            string ID = GrvRepairMailbox.DataKeys[e.RowIndex].Value.ToString();

            //string IsVisted = ((TextBox)(GrvRepairMailbox.Rows[e.RowIndex].Cells[5].Controls[0])).Text.ToString().Trim();



            string IsVisted = ((DropDownList)(this.GrvRepairMailbox.Rows[e.RowIndex].FindControl("ddl1"))).SelectedValue.ToString().Trim();



            string Isolved = ((TextBox)(GrvRepairMailbox.Rows[e.RowIndex].Cells[6].Controls[0])).Text.ToString().Trim();

            string udpsql = "update EP_TblMailbox set IsVisted='" + IsVisted + "', Isolved='" + Isolved + "' where ID='" + ID + "'";

            dataOperate.execSQL(udpsql);

            GrvRepairMailbox.EditIndex = -1;

            GrvRepairMailboxbindData();

        }

绑定数据

protected void GrvRepairMailboxbindData()

        {

            string sql = "select * from EP_TblMailbox where SendToDepartment = '维修部'";

            GrvRepairMailbox.DataSource = dataOperate.getDataset(sql, "EP_TblRepairMailbox");

            GrvRepairMailbox.DataKeyNames = new string[] { "ID" };

            GrvRepairMailbox.DataBind();

}

前台代码

<asp:GridView ID="GrvRepairMailbox" runat="server" AutoGenerateColumns="False" 

            onselectedindexchanging="GrvRepairMailbox_SelectedIndexChanging" 

            onrowcancelingedit="GrvRepairMailbox_RowCancelingEdit" 

            onrowediting="GrvRepairMailbox_RowEditing" 

            onrowupdating="GrvRepairMailbox_RowUpdating">

            <Columns>

                <asp:BoundField DataField="ID" HeaderText="编号" />

                <asp:BoundField DataField="SenderName" HeaderText="发布人" /&g