Question

由于有问题的数据源是join语句的结果，我必须指定delete命令。我试着做以下但是没有用。

<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" OldValuesParameterFormatString="original_{0}" DeleteMethod="GridView1_RowDeleting" SelectMethod="GetSubjectPrerequisites" TypeName="EnrolSystemCore.SubjectPrerequisitesDSTableAdapters.subjectsTableAdapter">
        <SelectParameters>
            <asp:QueryStringParameter DefaultValue="32113" Name="subjectid" QueryStringField="subjectid" Type="Int32" />
        </SelectParameters>
    </asp:ObjectDataSource>
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="sj_id" DataSourceID="ObjectDataSource1" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" AllowSorting="True">
        <Columns>
            <asp:BoundField DataField="sj_id" HeaderText="sj_id" ReadOnly="True" SortExpression="sj_id" />
            <asp:BoundField DataField="sj_name" HeaderText="sj_name" SortExpression="sj_name" />
            <asp:ButtonField ButtonType="Button" CommandName="Delete" HeaderText="Delete" ShowHeader="True" Text="Delete" />
        </Columns>
    </asp:GridView>

并在.cs文件中创建以下删除行的方法：

    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {

        int subjectID = Convert.ToInt32(Request.QueryString["subjectID"]);
        GridViewRow row = GridView1.SelectedRow;
        int prerequisite1 = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Values[0].ToString());

        try
        {
            SubjectPrerequisites subjectPrerequisite1 = new SubjectPrerequisites();
            subjectPrerequisite1.removePreRequisite(subjectID, prerequisite1);
        }
        catch (Exception)
        {

        }
    }

但每当我尝试删除一行时，它会给我以下错误：

ObjectDataSource'ObjectDataSource1'找不到具有参数的非泛型方法'GridView1_RowDeleting'：original_sj_id。

我该如何解决这个问题？我研究了现有的解决方案，但是他们在我不想要的aspx页面中执行删除过程。

当datasource是join语句的结果时，删除gridview行

0 个答案: