Why does my insert command insert duplicate rows for each insert? - vb.net

Question

This was working correctly, but now its inserting duplicate rows everytime I perform an insert from the page. Both rows are good with all data inserted correctly, but its putting the record in the database twice each time. How do I stop this?
VB.net code:
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 code
Datasource:
<asp:SqlDataSource ID="dsOncallGroup" runat="server"
ConnectionString="<%$ ConnectionStrings:DiscussSQLConnectionString %>"
SelectCommand="SELECT * FROM tblOnCallSchedule WHERE (tblOnCallSchedule.fldOnCallGroup = #fldOnCallGroup)
AND (tblOnCallSchedule.fldEndOnCall > 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 Code:
<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" />
<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" />
<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

Put a break point on the call to dsOncallGroup.Insert() and see if it is called twice, if so then it is your code doing it and you can figure out where the second call is happening by examining the Call Stack window (Debug -> Windows -> Call Stack).
If there are not two calls in the code, then you need to investigate if a trigger has been added to your database that is somehow causing extra data to be inserted.