Gridview - 更新事件不触发

Question

当我单击gridview的“编辑”按钮时，它将显示“更新”和“取消”按钮。但是当我点击“Update”按钮时，它不会触发任何事件“RowUpdating”，RowUpdated”，“RowCommand”......它重新加载页面，然后gridview消失。

以下是我的asp代码：

<asp:GridView ID="Gridview1" runat="server" EnableViewState="False"
AutoGenerateColumns = "False" Font-Names = "Arial"
Font-Size = "10pt" AlternatingRowStyle-BackColor = "#C2D69B" 
AutoGenerateEditButton="false" 
AllowPaging ="True"  
PageSize = "20"
OnRowCommand="GridView1_RowCommand" 
OnRowDataBound="GridView1_RowDataBound"
OnRowEditing="GridView1_RowEditing"
OnRowCancelingEdit="GridView1_RowCancelingEdit"
OnRowUpdating="GridView1_RowUpdating"
OnPageIndexChanging="GridView1_PageIndexChanging">       
<HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#F7F7F7" />
<Columns>
 <asp:BoundField DataField = "Name&Post" HeaderText = "Name & Post"  ReadOnly ="true" />
<asp:TemplateField HeaderText="Working<br>Time">
<ItemTemplate>
<asp:Label ID="lb1_rosterkey"  runat="server"  Text='<%#DataBinder.Eval(Container.DataItem, "Col1_RosterKey")%>'  Visible ="false" ></asp:Label>
<asp:DropDownList ID="ddl1_shifttype" runat ="server"  Enabled ="false"  DataSourceID="SqlDataSource2" DataTextField ="en_name" DataValueField ="shift_type_key">       </asp:DropDownList>
<MKB:TimeSelector ID="Col1_StartTime" runat="server" DisplaySeconds="False" ReadOnly="true" MinuteIncrement="1" AmPm="AM" BorderColor="Silver" 
                            Date="" Hour="07" Minute="0"  SelectedTimeFormat="Twelve">   </MKB:TimeSelector>
<MKB:TimeSelector ID="Col1_EndTime" runat="server" DisplaySeconds="False"  ReadOnly="true" MinuteIncrement="1" AmPm="PM" BorderColor="Silver" 
                            Date="" Hour="07" Minute="0" SelectedTimeFormat="Twelve">   </MKB:TimeSelector>                                 
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="ddl1_shifttype" runat ="server"  DataSourceID="SqlDataSource2" DataTextField ="en_name" DataValueField ="shift_type_key"></asp:DropDownList>
<MKB:TimeSelector ID="Col1_StartTime" runat="server" DisplaySeconds="False"  MinuteIncrement="1" AmPm="AM" BorderColor="Silver" 
                            Date="" Hour="07" Minute="0"  SelectedTimeFormat="Twelve">     </MKB:TimeSelector>
<MKB:TimeSelector ID="Col1_EndTime" runat="server" DisplaySeconds="False"  MinuteIncrement="1" AmPm="PM" BorderColor="Silver" 
                            Date="" Hour="07" Minute="0" SelectedTimeFormat="Twelve">    </MKB:TimeSelector>
</EditItemTemplate> 
</asp:TemplateField>
<asp:TemplateField HeaderText="Leave/<br>TOIL">
<ItemTemplate>
<asp:CheckBox
ID="cb1_VL" Enabled="false" Text="VL" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_VL")%> />
<asp:CheckBox
ID="cb1_SL" Enabled="false" Text="SL" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_SL")%> />
<asp:CheckBox
ID="cb1_ML" Enabled="false" Text="ML" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_ML")%> />
<asp:CheckBox
ID="cb1_PH" Enabled="false" Text="PH" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_PH")%> />
<asp:CheckBox
ID="cb1_APH" Enabled="false" Text="APH" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_APH")%> />
<asp:CheckBox
ID="cb1_TOIL" Enabled="false" Text="TOIL" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_TOIL")%> />
<br />
<%#DataBinder.Eval(Container.DataItem, "Col1_Others")%>
</ItemTemplate>
<EditItemTemplate>
<asp:CheckBox
ID="cb1_VL" Text="VL" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_VL")%> />
<asp:CheckBox
ID="cb1_SL"  Text="SL" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_SL")%> />
<asp:CheckBox
ID="cb1_ML"  Text="ML" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_ML")%> />
<asp:CheckBox
ID="cb1_PH"  Text="PH" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_PH")%> />
<asp:CheckBox
ID="cb1_APH"  Text="APH" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_APH")%> />
<asp:CheckBox
ID="cb1_TOIL" Text="TOIL" 
runat="server"
Checked=<%#DataBinder.Eval(Container.DataItem, "Col1_TOIL")%> />
<asp:TextBox ID="tb1_Others" runat="server" Width="50" Text='<%#DataBinder.Eval(Container.DataItem, "Col1_Others") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>

......

下面是VB代码：

Protected Sub GridView1_RowEditing(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
    'Set the edit index.
    Gridview1.EditIndex = e.NewEditIndex        
    'Bind data to the GridView control.
    BindData()
End Sub

Protected Sub GridView1_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs)
    'Reset the edit index.
    Gridview1.EditIndex = -1
    'Bind data to the GridView control.
    BindData()
End Sub

Protected Sub GridView1_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
    'Retrieve the table from the session object.
    Dim dt = CType(Session("dt"), DataTable)

    'Update the values.
    Dim row = Gridview1.Rows(e.RowIndex)



    'Reset the edit index.
    Gridview1.EditIndex = -1

    'Bind data to the GridView control.
    BindData()
End Sub

Private Sub BindData()

    Dim StartDateStr As String

    StartDateStr = Trim(Request.QueryString("sd"))
    StartDateStr = Left(StartDateStr, 10)
    'date should be best in ISO format, i.e. yyyy-mm-ddTHH:mm:ss[.mmm] as "Set Dateformat dmy" is not supported by DataSet object
    'StartDateStr = Right(StartDateStr, 4) & "-" & Mid(StartDateStr, 4, 2) & "-" & Left(StartDateStr, 2) & " T00:00:00"

    Dim StartDate As DateTime
    Dim EndDate As DateTime
    StartDate = Convert.ToDateTime(StartDateStr)
    EndDate = Format(DateAdd(DateInterval.Day, 6, StartDate), "dd/MM/yyyy")

    g_header1 = StartDate   'Monday
    g_header2 = Format(DateAdd(DateInterval.Day, 1, StartDate), "dd/MM/yyyy")
    g_header3 = Format(DateAdd(DateInterval.Day, 2, StartDate), "dd/MM/yyyy")
    g_header4 = Format(DateAdd(DateInterval.Day, 3, StartDate), "dd/MM/yyyy")
    g_header5 = Format(DateAdd(DateInterval.Day, 4, StartDate), "dd/MM/yyyy")
    g_header6 = Format(DateAdd(DateInterval.Day, 5, StartDate), "dd/MM/yyyy")
    g_header7 = EndDate     'Sunday

    Gridview1.DataSource = Session("dt")
    Gridview1.DataBind()
End Sub

Protected Sub GridView1_DataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Handles Gridview1.RowDataBound
    If e.Row.RowType = DataControlRowType.DataRow AndAlso e.Row.RowState = DataControlRowState.Edit Then
        'If e.Row.RowType = DataControlRowType.DataRow Then
        Dim row = DirectCast(e.Row.DataItem, DataRowView).Row
        Dim Col1_StartTime = DirectCast(e.Row.FindControl("Col1_StartTime"), MKB.TimePicker.TimeSelector)
        'set the TimePicker's Value here according to the Time-Value in the DataRow'
    End If
End Sub

Protected Sub Gridview1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles Gridview1.RowCommand
    If e.CommandName = "Update" Then
        'Reset the edit index.
        Gridview1.EditIndex = -1

        'Bind data to the GridView control.
        BindData()
    End If

End Sub

Answer 1

在 asp:TemplateField 中使用具有正确 CommandName 的按钮，它将触发相应的事件。

例子

<asp:TemplateField>
    <ItemTemplate>
            <asp:Button id="btnEdit" runat="server" commandname="Edit" text="Edit" />
            <asp:Button id="btnDelete" runat="server" commandname="Delete" text="Delete" />
    </ItemTemplate>
    <EditItemTemplate>
            <asp:Button id="btnUpdate" runat="server" commandname="Update" text="Update" />
            <asp:Button id="btnCancel" runat="server" commandname="Cancel" text="Cancel" />
    </EditItemTemplate>
</asp:TemplateField>

Answer 2

我解决了我的问题。

我需要设置 CausesValidation="false"

Answer 3

在 gridview 中设置 enableviewstate=true

Answer 4

你是在页面加载时写的吗，如果没有添加这个

if me.ispostback= false then
'grid fill statement

end if

Answer 5

我不确定您的保存/取消按钮位于何处，但您可能需要按照 MSDN

即。

Answer 6

我从未使用过单独的 rowupdate/rowedit 命令，但我确实使用了以下命令：

在我的网格列列表中，我添加了命令字段和图像（按钮可选）

        <asp:CommandField HeaderText="Edit" ButtonType="Image" ShowCancelButton="true" ShowEditButton="True"
            EditImageUrl="../images/esig.gif" CancelImageUrl="../images/btn_close.gif"
            UpdateImageUrl="../images/icn_ok.gif" />

我在代码中没有看到这一点。

网格编辑的示例如下

在后面的代码中，您应该能够检查 RowDataBound 事件，如下所示（Grida 是示例网格的名称）

Protected Sub Grida_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles Grida.RowDataBound


'check for row in edit mode
    If (e.Row.RowState = DataControlRowState.Edit) then
' create handles for the row being edited 
   Dim drv As System.Data.DataRowView = CType(e.Row.DataItem, System.Data.DataRowView)

 ' locate the dropdownbox (in my page)

  Dim dllven As DropDownList = CType(e.Row.Cells(3).FindControl("DropDownVendor"), DropDownList)

   ' check what item was selected in this DDL when in editmode

        Dim li As ListItem = dllven.Items.FindByText(drv("Vendor").ToString)

   ' set the selection  upon return

        li.Selected = True



  end if

End Sub

非常适合我。