Question

我正在尝试在网格视图中使用GridViewCommandEventArgs，但是当我运行它时仍然说：数据源“SqlDataSource1”不支持更新，除非指定了UpdateCommand。

我在网格中有多个Linkbuttons因此OnRowCommand

OnRowCommand =“Grid_Row”

<asp:TemplateField>
                 <ItemTemplate>
                <asp:LinkButton ID="Update" CommandArgument='<%#Eval("Serno") %>' runat="server"    OnClientClick="return confirm('Are you sure you want to Update this?');" CommandName ="Update" >Update</asp:LinkButton>
            </ItemTemplate>
           </asp:TemplateField> 
             <asp:TemplateField>
                 <ItemTemplate>
             <asp:LinkButton ID="Remove" CommandArgument='<%#Eval("Serno") %>' runat="server"    OnClientClick="return confirm('Are you sure you want to Remove this Item?');" CommandName ="Remove" >Remove</asp:LinkButton>
                </ItemTemplate>
             </asp:TemplateField> 




   protected void Grid_Row(Object sender, GridViewCommandEventArgs e)
{



    LinkButton Remove = (LinkButton)GridView1.FindControl("Remove");
    LinkButton Update = (LinkButton)GridView1.FindControl("Update");
    if (e.CommandName == "Remove")
    {
        try
        {

            int index = Convert.ToInt32(e.CommandArgument);
            SqlConnection con = new SqlConnection(Constring);
            con.Open();
            SqlCommand cmd = new SqlCommand(" update [Order_Items] set status=0 WHERE [Serno] =" + index.ToString() + "", con);
            if (cmd.ExecuteNonQuery() > 0)
            {


                GridView1.DataBind();
                msg_lbl.Text = "Record Deleted";

            }
            else
            {

            }
            con.Close();
        }
        catch
        {


        }
    }
    else if (e.CommandName == "Update")
    {
        try
        {


            int index = Convert.ToInt32(e.CommandArgument);

           [Convert.ToDouble(e.CommandArgument)].FindControl("Quantity");

            GridViewRow clickedRow = ((LinkButton)e.CommandSource).NamingContainer as GridViewRow;
            string Q = ((TextBox)clickedRow.FindControl("Quantity_Txt") as TextBox).Text;
            string P = ((Label )clickedRow.FindControl("Amount_Lbl") as Label ).Text;


            double Quantity = Convert.ToDouble(Q);

            double Price = Convert.ToDouble(P);
            double Calc = Quantity * Price;


            SqlConnection con = new SqlConnection(Constring);
            con.Open();
            SqlCommand cmd = new SqlCommand("update [Order_Items] set Quantity='"+Quantity +"', Money='" + Calc + "' WHERE [Serno] =" + index.ToString() + "", con);
            if (cmd.ExecuteNonQuery() > 0)
            {


                GridView1.DataBind();
                msg_lbl.Text = "Record Updated";



            }
            else
            {

            }
            con.Close();
            }

        catch
        {


        }

    }



}

Answer 1

这是因为您为命令名指定了关键字。将它们更改为其他字词，例如：UPD或delete。

Answer 2

您似乎未在数据源中指定UpdateCommand。

与指定select命令和选择参数的方式相同，您必须指定更新命令。

希望这有帮助

Gridview中的OnRowCommand会出错

2 个答案: