为什么我的insert命令为每个插入插入重复的行？

Question

这是正常的，但现在每次我从页面执行插入时插入重复的行。两行都很好，所有数据都正确插入，但每次都将记录放入数据库两次。我该如何阻止它？

VB.net代码：

Protected Sub gvOnCallSchedule_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.CommandEventArgs) Handles gvOnCallSchedule.RowCommand
    If e.CommandName = "Insert" AndAlso Page.IsValid Then
        Try
           dsOncallGroup.Insert()
        Catch ex As Exception
           MsgBox(Err.Description, MsgBoxStyle.Critical, "SQL Error")
        End Try
    End If


    If e.CommandName = "Delete" Then
        Try
            dsOncallGroup.Delete()
        Catch ex As Exception
            MsgBox(Err.Description, MsgBoxStyle.Critical, "SQL Error")
        End Try

        'Response.Redirect("Default.aspx")

    End If


End Sub


Protected Sub dsOnCallGroup_Inserting(ByVal sender As Object, ByVal e As SqlDataSourceCommandEventArgs) Handles dsOncallGroup.Inserting
    Dim strddlGroupName As New DropDownList
    Dim txtStartOnCall As New TextBox
    Dim txtEndOnCall As New TextBox
    Dim txtRank As New TextBox
    Dim strddlEmpName As New DropDownList
    Dim strddlOCPreferredContact As New DropDownList
    Dim txtEmpWorkPhone As New TextBox
    Dim txtEmpHomePhone As New TextBox
    Dim txtEmpHomeCellPhone As New TextBox
    Dim txtEmpAltPhone As New TextBox


    strddlGroupName = CType(gvOnCallSchedule.FooterRow.FindControl("ftrddlOCGroup"), DropDownList)
    txtStartOnCall = CType(gvOnCallSchedule.FooterRow.FindControl("txtStartOnCallFtr"), TextBox)
    txtEndOnCall = CType(gvOnCallSchedule.FooterRow.FindControl("txtEndOnCallFtr"), TextBox)
    txtRank = CType(gvOnCallSchedule.FooterRow.FindControl("txtCallOrderFtr"), TextBox)
    strddlEmpName = CType(gvOnCallSchedule.FooterRow.FindControl("ddlAnalystFtr"), DropDownList)
    strddlOCPreferredContact = CType(gvOnCallSchedule.FooterRow.FindControl("ftrddlOCPreferredContact"), DropDownList)
    txtEmpWorkPhone = CType(gvOnCallSchedule.FooterRow.FindControl("txtWorkPhoneFtr"), TextBox)
    txtEmpHomePhone = CType(gvOnCallSchedule.FooterRow.FindControl("txtHomePhoneFtr"), TextBox)
    txtEmpHomeCellPhone = CType(gvOnCallSchedule.FooterRow.FindControl("txtHomeCellPhoneFtr"), TextBox)
    txtEmpAltPhone = CType(gvOnCallSchedule.FooterRow.FindControl("txtAltPhoneFtr"), TextBox)


    e.Command.Parameters("@fldOnCallGroup").Value = strddlGroupName.Text
    e.Command.Parameters("@fldStartOnCall").Value = txtStartOnCall.Text
    e.Command.Parameters("@fldEndOnCall").Value = txtEndOnCall.Text
    e.Command.Parameters("@fldRank").Value = txtRank.Text
    e.Command.Parameters("@fldEmpName").Value = strddlEmpName.Text
    e.Command.Parameters("@fldOCPreferredContact").Value = strddlOCPreferredContact.Text
    e.Command.Parameters("@fldEmpWorkPhone").Value = txtEmpWorkPhone.Text
    e.Command.Parameters("@fldEmpHomePhone").Value = txtEmpHomePhone.Text
    e.Command.Parameters("@fldEmpHomeCellPhone").Value = txtEmpHomeCellPhone.Text
    e.Command.Parameters("@fldEmpAltPhone").Value = txtEmpAltPhone.Text

  End Sub

ASP代码 数据源：

<asp:SqlDataSource ID="dsOncallGroup" runat="server" 
    ConnectionString="<%$ ConnectionStrings:DiscussSQLConnectionString %>" 

    SelectCommand="SELECT * FROM tblOnCallSchedule WHERE (tblOnCallSchedule.fldOnCallGroup = @fldOnCallGroup) 
                   AND (tblOnCallSchedule.fldEndOnCall &gt; GETDATE()) 
                   ORDER BY tblOnCallSchedule.fldOnCallGroup, tblOnCallSchedule.fldEndOnCall, tblOnCallSchedule.fldRank" 
    OldValuesParameterFormatString="original_{0}"
    DeleteCommand="DELETE FROM tblOnCallSchedule WHERE fldOCID = @original_fldOCID" 
    InsertCommand="INSERT INTO [tblOnCallSchedule] ([fldOnCallGroup], [fldStartOnCall], [fldEndOnCall], [fldRank], [fldEmpName], [fldOCPreferredContact], [fldEmpWorkPhone],
                   [fldEmpHomePhone],[fldEmpHomeCellPhone],[fldEmpAltPhone]) 
                   VALUES (@fldOnCallGroup, @fldStartOnCall, @fldEndOnCall, @fldRank, @fldEmpName, @fldOCPreferredContact, @fldEmpWorkPhone, @fldEmpHomePhone, 
                           @fldEmpHomeCellPhone, @fldEmpAltPhone)" 



    UpdateCommand="UPDATE [tblOnCallSchedule] SET [fldOnCallGroup] = @fldOnCallGroup, [fldStartOnCall] = @fldStartOnCall, 
                   [fldEndOnCall] = @fldEndOnCall, [fldRank] = @fldRank, [fldEmpName] = @fldEmpName, [fldOCPreferredContact] = @fldOCPreferredContact,
                   [fldEmpWorkPhone] = @fldEmpWorkPhone,[fldEmpHomePhone] = @fldEmpHomePhone,[fldEmpHomeCellPhone] = @fldEmpHomeCellPhone,
                   [fldEmpAltPhone] = @fldEmpAltPhone

                   WHERE [fldOCID] = @original_fldOCID">

    <SelectParameters>
        <asp:ControlParameter ControlID="cboOncallGroup" Name="fldOnCallGroup" 
            PropertyName="SelectedValue" Type="String" />
    </SelectParameters>
    <DeleteParameters>
        <asp:Parameter Name= "original_fldOCID" Type="Int16" />          
    </DeleteParameters>
    <UpdateParameters>
        <asp:Parameter Name="fldOnCallGroup" Type="String" ConvertEmptyStringToNull="false" />
        <asp:Parameter Name="fldStartOnCall" DbType ="Date" />
        <asp:Parameter Name="fldEndOnCall" DbType ="Date" />
        <asp:Parameter Name= "fldRank" Type="Int16" />
        <asp:Parameter Name= "fldEmpName" Type="String" />
        <asp:Parameter Name= "fldOCPreferredContact" Type="String" />
        <asp:Parameter Name= "fldEmpWorkPhone" Type="String" />
        <asp:Parameter Name= "fldEmpHomePhone" Type="String" />
        <asp:Parameter Name= "fldEmpHomeCellPhone" Type="String" />
        <asp:Parameter Name= "fldEmpAltPhone" Type="String" />
        <asp:Parameter Name="original_fldOnCallGroup" Type="String" ConvertEmptyStringToNull="false" />
        <asp:Parameter Name="original_fldStartOnCall" DbType="Date" />
        <asp:Parameter Name="original_fldEndOnCall" DbType="Date" />
        <asp:Parameter Name="original_fldRank" Type="Int16" />
        <asp:Parameter Name="original_fldEmpName" Type="String" />
        <asp:Parameter Name="original_fldOCPreferredContact" Type="String" />
        <asp:Parameter Name="original_fldEmpWorkPhone" Type="String" />
        <asp:Parameter Name="original_fldEmpHomePhone" Type="String" />
        <asp:Parameter Name="original_fldEmpHomeCellPhone" Type="String" />
        <asp:Parameter Name="original_fldEmpAltPhone" Type="String" />
    </UpdateParameters>
    <InsertParameters>
        <asp:Parameter Name="fldOnCallGroup" Type="String" />
        <asp:Parameter DbType="Date" Name="fldStartOnCall" />
        <asp:Parameter DbType="Date" Name="fldEndOnCall" />
        <asp:Parameter Name="fldRank" Type="Int16" />
        <asp:Parameter Name="fldEmpName" Type="String" />
        <asp:Parameter Name="fldOCPreferredContact" Type="String" />
        <asp:Parameter Name="fldEmpWorkPhone" Type="String" />
        <asp:Parameter Name="fldEmpHomePhone" Type="String" />
        <asp:Parameter Name="fldEmpHomeCellPhone" Type="String" />
        <asp:Parameter Name="fldEmpAltPhone" Type="String" />           
        <asp:Parameter Name="original_fldOnCallGroup" Type="String" ConvertEmptyStringToNull="false" />
        <asp:Parameter Name="original_fldStartOnCall" DbType="Date" />
        <asp:Parameter Name="original_fldEndOnCall" DbType="Date" />
        <asp:Parameter Name="original_fldRank" Type="Int16" />
        <asp:Parameter Name="original_fldEmpName" Type="String" />
        <asp:Parameter Name="original_fldOCPreferredContact" Type="String" />
        <asp:Parameter Name="original_fldEmpWorkPhone" Type="String" />
        <asp:Parameter Name="original_fldEmpHomePhone" Type="String" />
        <asp:Parameter Name="original_fldEmpHomeCellPhone" Type="String" />
        <asp:Parameter Name="original_fldEmpAltPhone" Type="String" />
      </InsertParameters>
</asp:SqlDataSource>

Gridview代码：

<asp:Gridview ID="gvOnCallSchedule" runat="server" AllowSorting="True" AllowPaging="True" showfooter="true"
        OnRowUpdating="GvOnCall_Update" onRowCommand="gvOnCallSchedule_RowCommand" DataKeyNames="fldOCID"
        BackColor="Aqua" DataSourceID="dsOncallGroup" Font-Bold="True"
        Font-Italic="False" Font-Overline="False" Font-Strikeout="False" 
        Font-Underline="False" ForeColor="#333333" HorizontalAlign="Justify" 
        CellPadding="4" GridLines="None" PageSize="20" AutoGenerateColumns ="false" 
        OnSelectedIndexChanged="cboOnCallGroup_SelectedIndexChanged">

        <Columns>
            <asp:TemplateField ShowHeader="false"> 
                <FooterTemplate>
                    <asp:ImageButton ID="AddButton" runat="server" CommandName="Insert" ImageURL="~/images/New.png" 
                         Text="Add" ToolTip="Add New On Call Record" />                
                </FooterTemplate>

                <EditItemTemplate>
                        <asp:ImageButton ID="UpdateButton" runat="server" CausesValidation="False" CommandName="Update" 
                                ImageUrl="~/images/Save.png" Text="Update" ToolTip="Update" />
                                &nbsp;
                        <asp:ImageButton ID="CancelButton" runat="server" CausesValidation="false" CommandName="Cancel"
                                ImageURL="~/images/Cancel.png" Text="Cancel" ToolTip="Cancel" />
                </EditItemTemplate>

                <ItemTemplate>
                    <asp:ImageButton ID="EditButton" runat="server" CausesValidation="False" CommandName="Edit" 
                                ImageUrl="~/images/Edit.gif" Text="Edit" ToolTip="Edit" />
                                &nbsp;
                    <asp:ImageButton ID="DeleteButton" runat="server" CausesValidation="False" CommandName="Delete" 
                                ImageUrl="~/images/Delete.png" Text="Delete" ToolTip="Delete" />
                </ItemTemplate>
                <ItemStyle Wrap="false" />   
            </asp:TemplateField>       

            <asp:Boundfield headertext="fldOCID" datafield="fldOCID" sortexpression="fldOCID" visible="false" InsertVisible="False" />               

            <asp:TemplateField headertext="On Call Group">
                <ItemTemplate>
                    <asp:DropDownList ID="ddlOCGroup" width="200px" runat="server" datavaluefield="fldOnCallGroup" Enabled="false"
                        DataSourceID= "dsListbox" SelectedValue="<%# Bind('fldOnCallGroup') %>"> 
                    </asp:DropDownList>
                </ItemTemplate>
                <FooterTemplate>
                    <asp:DropDownList ID="ftrddlOCGroup" width="200px" runat="server" datavaluefield="fldOnCallGroup"
                        DataSourceID= "dsListbox" SelectedValue="<%# Bind('fldOnCallGroup') %>"> 
                    </asp:DropDownList>
                </FooterTemplate>
            </asp:TemplateField>


            <asp:TemplateField headertext="Start Date/Time">
                <ItemTemplate>
                    <asp:Textbox ID="txtStartOnCall" runat="server" Text='<%# Bind("fldStartOnCall") %>'> 
                        </asp:Textbox>
                    <asp:Image ID="calpopup" runat="server" ImageUrl="~/images/calendar2.png" />
                    <asp:CalendarExtender ID="StartOnCallCal" runat="server" TargetControlID="txtStartOnCall" 
                            PopupButtonID="calpopup" PopupPosition="Right" format="MM/dd/yyyy">
                    </asp:CalendarExtender>
                </ItemTemplate>
                <FooterTemplate>              
                    <asp:Textbox ID="txtStartOnCallFtr" runat="server" Text='<%# Bind("fldStartOncall") %>'> 
                        </asp:Textbox>
                    <asp:Image ID="calpopupFtr" runat="server" ImageUrl="~/images/calendar2.png" />    
                    <asp:CalendarExtender ID="StartOnCallCalFtr" runat="server" TargetControlID="txtStartOnCallFtr" 
                            PopupButtonID="calpopupFtr" PopupPosition="Right" format="MM/dd/yyyy">
                    </asp:CalendarExtender>

                </FooterTemplate> 
            </asp:TemplateField>

            <asp:TemplateField headertext="End Date/Time">
                <ItemTemplate>
                    <asp:Textbox ID="txtEndOnCall" runat="server" Text='<%# Bind("fldEndOnCall") %>'> 
                        </asp:Textbox>
                    <asp:Image ID="calpopup2" runat="server" ImageUrl="~/images/calendar2.png" />
                    <asp:CalendarExtender ID="EndOnCallCal" runat="server" TargetControlID="txtEndOnCall" 
                            PopupButtonID="calpopup2" PopupPosition="Right" format="MM/dd/yyyy">
                    </asp:CalendarExtender>
                </ItemTemplate>
                <FooterTemplate>              
                    <asp:Textbox ID="txtEndOnCallFtr" runat="server" Text='<%# Bind("fldEndOnCall") %>'> 
                        </asp:Textbox>
                    <asp:Image ID="calpopup2Ftr" runat="server" ImageUrl="~/images/calendar2.png" />    
                    <asp:CalendarExtender ID="EndOnCallCalFtr" runat="server" TargetControlID="txtEndOnCallFtr" 
                            PopupButtonID="calpopup2Ftr" PopupPosition="Right" format="MM/dd/yyyy">
                    </asp:CalendarExtender>

                </FooterTemplate> 
            </asp:TemplateField>


            <asp:TemplateField headertext="Call Order">
                <ItemTemplate>
                    <asp:Textbox ID="lblCallOrder" runat="server" width="100" Text='<%# Bind("fldRank") %>'> 
                        </asp:Textbox>
                </ItemTemplate>
                <FooterTemplate>              
                    <asp:Textbox ID="txtCallOrderFtr" runat="server" width="100" Text='<%# Bind("fldOnCallGroup") %>'> 
                        </asp:Textbox>
                </FooterTemplate> 
            </asp:TemplateField>


            <asp:TemplateField HeaderText="OnCall Analyst">
                <ItemTemplate>
                    <asp:DropDownList ID="ddlAnalyst" runat="server" datavaluefield="fldEmpName"
                    datasourceID="dsEmp" SelectedValue='<%# Bind("fldEmpName") %>'> 
                    </asp:DropDownList>
                </ItemTemplate>
                <FooterTemplate>
                    <asp:DropDownList ID="ddlAnalystFtr" runat="server" datavaluefield="fldEmpName"
                        DataSourceID= "dsEmp" SelectedValue='<%# Bind("fldEmpName") %>'> 
                    </asp:DropDownList>
                </FooterTemplate>
            </asp:TemplateField>

            <asp:TemplateField HeaderText="Preferred Contact">
                <ItemTemplate>
                    <asp:DropDownList ID="ddlOCPreferredContact" Width="150px" runat="server" datavaluefield="fldOCPreferredContact"
                    datasourceID="dsPref" SelectedValue='<%# Bind("fldOCPreferredContact") %>'> 
                    </asp:DropDownList>
                </ItemTemplate>
                <FooterTemplate>
                    <asp:DropDownList ID="ftrddlOCPreferredContact" width="150px" runat="server" datavaluefield="fldOCPreferredContact"
                        DataSourceID= "dsPref" SelectedValue='<%# Bind("fldOCPreferredContact") %>'> 
                    </asp:DropDownList>
                </FooterTemplate>
            </asp:TemplateField>


            <asp:TemplateField headertext="Work Phone">
                <ItemTemplate>
                    <asp:Textbox ID="lblWorkPhone" runat="server" width="90" Text='<%# Bind("fldEmpWorkPhone") %>'> 
                        </asp:Textbox>
                </ItemTemplate>
                <FooterTemplate>              
                    <asp:Textbox ID="txtWorkPhoneFtr" runat="server" width="90" Text='<%# Bind("fldEmpWorkPhone") %>'> 
                        </asp:Textbox>
                </FooterTemplate> 
            </asp:TemplateField>

            <asp:TemplateField headertext="Home Phone">
                <ItemTemplate>
                    <asp:Textbox ID="lblHomePhone" runat="server" width="90" Text='<%# Bind("fldEmpHomePhone") %>'> 
                        </asp:Textbox>
                </ItemTemplate>
                <FooterTemplate>              
                    <asp:Textbox ID="txtHomePhoneFtr" runat="server" width="90" Text='<%# Bind("fldEmpHomePhone") %>'> 
                        </asp:Textbox>
                </FooterTemplate> 
            </asp:TemplateField>

            <asp:TemplateField headertext="Personal Cell">
                <ItemTemplate>
                    <asp:Textbox ID="lblHomeCellPhone" runat="server" width="95" Text='<%# Bind("fldEmpHomeCellPhone") %>'> 
                        </asp:Textbox>
                </ItemTemplate>
                <FooterTemplate>              
                    <asp:Textbox ID="txtHomeCellPhoneFtr" runat="server" width="95" Text='<%# Bind("fldEmpHomeCellPhone") %>'> 
                        </asp:Textbox>
                </FooterTemplate> 
            </asp:TemplateField>

            <asp:TemplateField headertext="Alternate Phone">
                <ItemTemplate>
                    <asp:Textbox ID="lblAltPhone" runat="server" width="105" Text='<%# Bind("fldEmpAltPhone") %>'> 
                        </asp:Textbox>
                </ItemTemplate>
                <FooterTemplate>              
                    <asp:Textbox ID="txtAltPhoneFtr" runat="server" width="105" Text='<%# Bind("fldEmpAltPhone") %>'> 
                        </asp:Textbox>
                </FooterTemplate> 
            </asp:TemplateField>

        </Columns>
        <FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
        <PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />
        <SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
        <HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
        <EditRowStyle BackColor="#7C6F57" />
        <AlternatingRowStyle BackColor="White" />

    </asp:Gridview>

Answer 1

在对dsOncallGroup.Insert()的调用上设置一个断点，看看它是否被调用了两次，如果是，那么你的代码是这样做的，你可以通过检查{{1来找出第二次调用的位置窗口（Call Stack）。

如果代码中没有两个调用，那么您需要调查是否已将某个触发器添加到数据库中，从而导致插入额外数据。