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这是代码隐藏(CType(row.Cells(0).Controls(0), TextBox))中的原始行，它不起作用。之后，我将其更改为row.Cells(1)并在尝试更新 GridView 中的字段时收到上述错误。这是aspx标记：

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" 
     AllowSorting="True" AutoGenerateColumns="False" CellPadding="4" 
     DataKeyNames="TicketID" DataSourceID="historySqlDataSource" ForeColor="#333333" 
     GridLines="None" Width="828px" OnRowEditing="GridView1_RowEditing"
     OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowUpdating="GridView1_RowUpdating">
           <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
              <Columns>
                 <asp:CommandField ShowEditButton="True" />
                 <asp:BoundField DataField="TicketID" HeaderText="TicketID" 
                  InsertVisible="False" ReadOnly="True" SortExpression="TicketID" />
                 <asp:BoundField DataField="DateCreated" HeaderText="DateCreated" 
                  SortExpression="DateCreated" />
                 <asp:BoundField DataField="FullName" HeaderText="FullName" 
                  SortExpression="FullName" />
                 <asp:BoundField DataField="Email" HeaderText="Email" SortExpression="Email" />
                 <asp:BoundField DataField="TicketType" HeaderText="TicketType" 
                  SortExpression="TicketType" />
                 <asp:BoundField DataField="Subject" HeaderText="Subject" 
                  SortExpression="Subject" />
                 <asp:BoundField DataField="Message" HeaderText="Message" 
                  SortExpression="Message" />
                 <asp:BoundField DataField="Status" HeaderText="Status" 
                  SortExpression="Status" />
              </Columns>
                 <EditRowStyle BackColor="#999999" />
                 <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                 <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                 <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
                 <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
                 <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                 <SortedAscendingCellStyle BackColor="#E9E7E2" />
                 <SortedAscendingHeaderStyle BackColor="#506C8C" />
                 <SortedDescendingCellStyle BackColor="#FFFDF8" />
                 <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>

以下是代码隐藏：

Protected Sub GridView1_RowEditing(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
    GridView1.EditIndex = e.NewEditIndex
    BindData()
End Sub

Protected Sub GridView1_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs)
    GridView1.EditIndex = 1
    BindData()
End Sub

Protected Sub GridView1_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
    Dim dt = CType(Session("dt"), DataTable)

    'if your current DataSource be in Session
    Dim row As GridViewRow = GridView1.Rows(e.RowIndex)

    dt.Rows(row.DataItemIndex)("TicketID") = (CType(row.Cells(1).Controls(0), TextBox)).Text
    dt.Rows(row.DataItemIndex)("DateCreated") = (CType(row.Cells(2).Controls(0), TextBox)).Text
    dt.Rows(row.DataItemIndex)("FullName") = (CType(row.Cells(3).Controls(0), TextBox)).Text
    dt.Rows(row.DataItemIndex)("TicketType") = (CType(row.Cells(4).Controls(0), TextBox)).Text
    dt.Rows(row.DataItemIndex)("Subject") = (CType(row.Cells(5).Controls(0), TextBox)).Text
    dt.Rows(row.DataItemIndex)("Message") = (CType(row.Cells(6).Controls(0), TextBox)).Text
    dt.Rows(row.DataItemIndex)("Status") = (CType(row.Cells(7).Controls(0), TextBox)).Text

    Session("dt") = dt
    GridView1.EditIndex = 1
    BindData()

End Sub

Private Sub BindData()

    GridView1.DataBind()

End Sub
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