Question

尝试更新GridView中的数据并收到异常错误。最初，我有 GridView1.EditIndex = -1 ，然后我读到索引号不应该是负数，所以我将其更改为 = 1 ，但它仍然没有'工作。

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    Dim dt As New DataTable("historyList")

    dt.Columns.Add("TicketID", GetType(Integer))
    dt.Columns.Add("DateCreated", GetType(DateTime))
    dt.Columns.Add("FullName", GetType(String))
    dt.Columns.Add("TicketType", GetType(String))
    dt.Columns.Add("Subject", GetType(String))
    dt.Columns.Add("Message", GetType(String))
    dt.Columns.Add("Status", GetType(String))

    For i = 0 To 6
        Dim tableRow = dt.NewRow()
        tableRow("TicketID") = i
        tableRow("DateCreated") = Now()
        tableRow("FullName") = i.ToString()
        tableRow("TicketType") = i.ToString()
        tableRow("Subject") = i.ToString()
        tableRow("Message") = i.ToString()
        tableRow("Status") = i.ToString()
    Next

    Session("dt") = dt

    BindData()

End Sub

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

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

End Sub

Private Sub BindData()

    GridView1.DataBind()

End Sub

所以，这是我的aspx代码：

                <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>

Answer 1

在你的for循环中缺少一个添加行的片段

For i = 0 To 6
    Dim tableRow = dt.NewRow()
    tableRow("TicketID") = i
    tableRow("DateCreated") = Now()
    tableRow("FullName") = i.ToString()
    tableRow("TicketType") = i.ToString()
    tableRow("Subject") = i.ToString()
    tableRow("Message") = i.ToString()
    tableRow("Status") = i.ToString()
    dt.Rows.Add(tableRow); // <-- this line is required
 Next

Answer 2

如果我没记错，可以在DataBind之后设置EditIndex。因为在此之前，没有索引1。请试试。

IndexOutOfRangeException。位置0没有行

2 个答案: