Gridview Footer Sum Doubles on UPDATE only.

Posted on 2015-01-29
Medium Priority
Last Modified: 2015-01-30
Hi Experts,

I'm at a lose on how to fix this problem.

I have a gridview that uses the RowDataBound to display the sum of the totals for each record in my grid.

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

        If e.Row.RowType = DataControlRowType.DataRow Then
            _EstCostTotal += Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "EstimatedCost"))
            _ActCostTotal += Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "ActualCost"))
            _ProposedTotal += Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "Proposed"))
            _AdjustedTotal += Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "Adjusted"))
            _CRDBTotal += Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "CreditDebit"))
        End If

        If Convert.ToInt32(Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "CreditDebit"))) < 0 Then
            e.Row.Cells(6).ForeColor = Drawing.Color.Red
        End If

        If e.Row.RowType = DataControlRowType.Footer Then
            ' Cell 0
            e.Row.Cells(1).Text = "Totals:"
            e.Row.Cells(1).HorizontalAlign = HorizontalAlign.Right

            ' Cell 1 - Estimated Total
            e.Row.Cells(2).Text = _EstCostTotal.ToString("c")
            e.Row.Cells(2).HorizontalAlign = HorizontalAlign.Right
            ' e.Row.Cells(2).CssClass = "pGrandTotal"

            ' Cell 2 - Actual Total
            e.Row.Cells(3).Text = _ActCostTotal.ToString("c")
            e.Row.Cells(3).HorizontalAlign = HorizontalAlign.Right
            ' e.Row.Cells(3).CssClass = "pGrandTotal"

            ' Cell 3 - Proposed Total
            e.Row.Cells(4).Text = _ProposedTotal.ToString("c")
            e.Row.Cells(4).HorizontalAlign = HorizontalAlign.Right
            e.Row.Cells(4).ForeColor = Drawing.Color.DarkGreen
            ' e.Row.Cells(4).CssClass = "pGrandTotal"

            ' Cell 4 - Adjusted Total
            e.Row.Cells(5).Text = _AdjustedTotal.ToString("c")
            e.Row.Cells(5).HorizontalAlign = HorizontalAlign.Right
            e.Row.Cells(5).ForeColor = Drawing.Color.DarkGreen
            ' e.Row.Cells(5).CssClass = "pGrandTotal"

            ' Cell 4 - Credit Debit
            e.Row.Cells(6).Text = _CRDBTotal.ToString("c")
            e.Row.Cells(6).HorizontalAlign = HorizontalAlign.Right
            ' e.Row.Cells(6).CssClass = "pGrandTotal"

            If Convert.ToInt32(_CRDBTotal) < 0 Then
                e.Row.Cells(6).ForeColor = Drawing.Color.Red
            End If

        End If

    End Sub

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When every I perform an either INSERT, DELETE or UPDATE the following subroutine is called:

Public Sub LoadGrid(ByVal worksheetID As Integer)

        Dim dt As DataTable = worksheetServicesLogic.GetServicesForWorksheet(worksheetID)

        If dt.Rows.Count > 0 Then

            ' Bind the main grid
            GridServices.DataSource = dt

        End If

    End Sub

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When I INSERT a record, the summary is correct.
When I DELETE a record, the summary is correct.
HOWEVER, when I UPDATE a record, the summary DOUBLES all the values???
Any idea as to what could be going on and more importantly, how can I fix it?
Question by:cdemott33
  • 3
LVL 22

Accepted Solution

Mrunal earned 1500 total points
ID: 40579334
Add debug point and check if your code for calculating and assigning column total is getting executed twice or not.

If it is executing only once then before binding grid again just clear it first and then bind again with updated records.
For clearing you can use below code:

GridServices.DataSource = null;

Hope this solves your issue.

Author Comment

ID: 40580250
Hi Mrunal - Thank you for your suggestion.  I followed your advice and here's what I've found.

Clicking UPDATE caused the RowDataBound event to executing TWICE for some reason?  Any idea as to why that would happen?

Author Comment

ID: 40580283
FYI:  This is my GridView... Just in case you what to have a look.

<asp:GridView ID="GridServices" runat="server" CssClass="mGrid" 
                                    AutoGenerateColumns="False" ShowFooter="True">
                                        <asp:TemplateField HeaderText="Service">
                                                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="false" OnCommand="OpenModal" CommandArgument='<%# Eval("ServiceID") %>'><%# Eval("ServiceType") %></asp:LinkButton>
                                            <HeaderStyle HorizontalAlign="Left" />
                                        <asp:TemplateField HeaderText="Options">
                                                <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="false" OnCommand="DeleteService" CommandArgument='<%# Eval("ServiceID") %>' OnClientClick='return confirm("Are you sure you want to delete this service?");'>Delete</asp:LinkButton>
                                            <HeaderStyle HorizontalAlign="Left" />
                                        <asp:BoundField DataField="EstimatedCost" DataFormatString="{0:c}" 
                                            HeaderText="Estimate" >
                                        <HeaderStyle HorizontalAlign="Left" />
                                        <ItemStyle HorizontalAlign="Right" />
                                        <asp:BoundField DataField="ActualCost" DataFormatString="{0:c}" 
                                            HeaderText="Actual" >
                                        <HeaderStyle HorizontalAlign="Left" />
                                        <ItemStyle HorizontalAlign="Right" />
                                        <asp:BoundField DataField="Proposed" DataFormatString="{0:c}" 
                                            HeaderText="Proposed" >
                                        <HeaderStyle HorizontalAlign="Left" />
                                        <ItemStyle HorizontalAlign="Right" ForeColor="#006600" />
                                        <asp:BoundField DataField="Adjusted" DataFormatString="{0:c}" 
                                            HeaderText="Adjusted" >
                                        <HeaderStyle HorizontalAlign="Left" />
                                        <ItemStyle HorizontalAlign="Right" ForeColor="#006600" />
                                        <asp:BoundField DataField="CreditDebit" DataFormatString="{0:c}"  
                                            HeaderText="CR/DB" >
                                        <HeaderStyle HorizontalAlign="Right" />
                                        <ItemStyle HorizontalAlign="Right" />
                                    <FooterStyle CssClass="pGrandTotal" />

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Author Closing Comment

ID: 40580528
Look like I discovered the problem.  There was an onclick="button_event" attached to the button.   I removed the onclick and ... bam... problem solved.  Thanks for your help.

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