DeveloperBarn

peebman2000 · #1 May 2nd, 2008, 08:57 AM

Hey everyone is peebman2000, currently working on a .net app questionaire. The client wants reports, that give them the tally or count of the number of answers people selected and the percentage that people selecting that answer.

I have code that will calulate the percentage as totals in the footer, but I need another footer added in the gridview to show the totals.

I was told before by someone on the forum, I could use Ajax to do something with the gridview to add the additional footer. I need to find out how to add the additional footer with totals along with the percentages.

I've looked online, I found some ideas and code to use the OnRowCreated method, but that didn't work for me.

Does anyone know how I can add an additional footer in a gridview?

I use the gridview to populate the clients information and then allow them to create the report by exporting it into an excel file.

Any help would be greatly appreciated, thanks so much.

My current small code:

Code:

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
        'Dim priceTotal As Decimal = 0'''CALCULATE TOTALS IN FOOTER
        Dim priceTotal2 As Decimal = 0
        

        If e.Row.RowType = DataControlRowType.DataRow Then
            ' add the UnitPrice and QuantityTotal to the running total variables
            Total += GetUnitPrice9(Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "Total")))
            
            priceTotal2 += GetUnitPrice(Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "Answer_1")))
           
        ElseIf e.Row.RowType = DataControlRowType.Footer Then
            e.Row.Cells(0).Text = "Totals:"
            ' for the Footer, display the running totals
            e.Row.Cells(2).Text = Total.ToString()
            e.Row.Cells(3).Text = Round(((GetTotal() / Total) * 100), 1).ToString + "%"

          



            e.Row.Cells(1).HorizontalAlign = HorizontalAlign.Center
            
            e.Row.Font.Bold = True

        End If


    End Sub

Dim TotalUnitPrice As Decimal = 0.0 

Function GetUnitPrice(ByVal Price As Decimal) As Decimal
        TotalUnitPrice += Price
        Return Price
    End Function
    Function GetTotal() As Decimal
        Return TotalUnitPrice
    End Function


Function GetUnitPrice9(ByVal Price As Decimal) As Decimal
        TotalUnitPrice9 += Price
        Return Price
    End Function
    Function GetTotal9() As Decimal
        Return TotalUnitPrice9
    End Function

jmurrayhead · #2 May 2nd, 2008, 09:13 AM

As far as I know, the GridView is limited to 1 footer only. This is why the Repeater control is your friend. You can make it do anything a GridView can and then some.

Maybe clarify for us on how this is supposed to look.

peebman2000 · #3 May 2nd, 2008, 10:14 AM

thanks jmurrayhead, i've never used the repeater. Can I bind data to the repeater like I would a gridview? Also I use the gridview to export data from it to a excel spreadsheet. Would I be able to export data from a repeater?

How i want it to look would be like this:

Thanks let me know.

Quote:

Originally Posted by jmurrayhead

As far as I know, the GridView is limited to 1 footer only. This is why the Repeater control is your friend. You can make it do anything a GridView can and then some.

Maybe clarify for us on how this is supposed to look.

jmurrayhead · #4 May 2nd, 2008, 10:23 AM

Okay, for GridView, it looks like you want to do something like this: CodeSnip: How to Display Sum Total in the Footer of the GridView Control: ASP Alliance

As far as the Repeater control, yes you can databind to it and I don't see any reason why you couldn't somehow output the data to an Excel document.

peebman2000 · #5 May 2nd, 2008, 10:32 AM

Hey thanks, but I have that footer snip of code, i'm actually using it to get my totals in the footer of my gridview, but I need another footer to show my percentages.

So in a repeater, i'm playing with the repeater now; I've never used it before. So what goes in between the repeater control? And i'll look up some links online on the control, but it seem not like your normal asp.net control.

Quote:

Originally Posted by jmurrayhead

Okay, for GridView, it looks like you want to do something like this: CodeSnip: How to Display Sum Total in the Footer of the GridView Control: ASP Alliance

As far as the Repeater control, yes you can databind to it and I don't see any reason why you couldn't somehow output the data to an Excel document.

jmurrayhead · #6 May 2nd, 2008, 10:42 AM

Here's an example of how I repeater would look:

Code:

<asp:Repeater ID="Repeater1" runat="server">
    <HeaderTemplate>
        <table>
            <tr>
                <th>Header1</th><th>Header2</th>
            </tr>
    </HeaderTemplate>
    <ItemTemplate>
        <tr>
            <td><asp:Label ID="Label1" runat="server" /></td>
            <td><asp:Label ID="Label2" runat="server" /></td>
        </tr>
    </ItemTemplate>
    <AlternatingItemTemplate>
        <tr class="altrow">
            <td><asp:Label ID="Label1" runat="server" /></td>
            <td><asp:Label ID="Label2" runat="server" /></td>
        </tr>
    </AlternatingItemTemplate>
    <FooterTemplate>
            <tr>
                <td>Some Data</td><td>Some Data</td>
             </tr>
             <tr>
                <td>Some Data</td><td>Some Data</td>
             </tr>
         </table>
    </FooterTemplate>
</asp:Repeater>

There are several ways you can bind to this control, including using the datasource controls or creating a DataTable and bind the repeater to the DataTable. It's highly customizeable AND it has it's own events.

Find out more about the Repeater control here: Repeater Class (System.Web.UI.WebControls)

peebman2000 · #7 May 2nd, 2008, 11:13 AM

Okay I see how that works, that should work, but how would I do the totals. Because in the gridview the datasource query does the counts or tallying of the answers. The GetUnitPrice function gives you the totals of the tallied data in the footer. So how would I do this........

You know what I kind of had a brain freeze, I guess I could use a datatable and calculate the totals and percentage from there. How does that sound?

Quote:

Originally Posted by jmurrayhead

Here's an example of how I repeater would look:

Code:

<asp:Repeater ID="Repeater1" runat="server">
    <HeaderTemplate>
        <table>
            <tr>
                <th>Header1</th><th>Header2</th>
            </tr>
    </HeaderTemplate>
    <ItemTemplate>
        <tr>
            <td><asp:Label ID="Label1" runat="server" /></td>
            <td><asp:Label ID="Label2" runat="server" /></td>
        </tr>
    </ItemTemplate>
    <AlternatingItemTemplate>
        <tr class="altrow">
            <td><asp:Label ID="Label1" runat="server" /></td>
            <td><asp:Label ID="Label2" runat="server" /></td>
        </tr>
    </AlternatingItemTemplate>
    <FooterTemplate>
            <tr>
                <td>Some Data</td><td>Some Data</td>
             </tr>
             <tr>
                <td>Some Data</td><td>Some Data</td>
             </tr>
         </table>
    </FooterTemplate>
</asp:Repeater>

There are several ways you can bind to this control, including using the datasource controls or creating a DataTable and bind the repeater to the DataTable. It's highly customizeable AND it has it's own events.

Find out more about the Repeater control here: Repeater Class (System.Web.UI.WebControls)

jmurrayhead · #8 May 2nd, 2008, 12:44 PM

Quote:

Originally Posted by peebman2000

You know what I kind of had a brain freeze, I guess I could use a datatable and calculate the totals and percentage from there. How does that sound?

That is one possibility. Another possibility would be to place some labels or whatever you want to use to display the data. Then, in the ItemDataBound event, use these controls as a holding place for the count and just add to the existing value.

peebman2000 · #9 May 2nd, 2008, 01:07 PM

jmurrayhead, thanks for the help, but this what I got. I've created a sql dat source that shows my practice repeater information, heres an image of shown when I compile or run the aspx page:

Now I want to calculate the totals for the Received columns and the Answars column. I tried using the same code I used to calculate the totals in the gridview, but I get an error:

Quote:

Server Error in '/questionaire' Application.
--------------------------------------------------------------------------------

Operator '=' is not defined for type 'DataRowView' and type 'DataControlRowType'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidCastException: Operator '=' is not defined for type 'DataRowView' and type 'DataControlRowType'.

Source Error:

Line 22: Dim total2 As Decimal = 0
Line 23:
Line 24: If e.Item.DataItem = DataControlRowType.DataRow Then
Line 25: Total += GetUnitPrice(Convert.ToDecimal(DataBinder.Eval(e.I tem.DataItem, "received")))
Line 26: total2 += GetUnitPrice(Convert.ToDecimal(DataBinder.Eval(e.I tem.DataItem, "ansers")))

Source File: C:\Documents and Settings\DPeebles\Desktop\wizard\questionaire\addr owgridview.aspx.vb Line: 24

Here the repeater source code: Aspx page

Code:

<form id="form1" runat="server">
    <div>
        </div>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:peebman %>" SelectCommand="SELECT COUNT(id) AS received, COUNT(cost) AS ansers, product
 FROM dbo.product 
 group by product"></asp:SqlDataSource>
        
        <asp:Repeater ID="Repeater1" runat="server" DataSourceID="SqlDataSource1">
        <HeaderTemplate>
                <table border=1>
                  <tr>
                    <td><b>Received</b></td>
                    <td><b>Answars</b></td>
                    <td><b>Product</b></td>
                  </tr>

        </HeaderTemplate>
        <ItemTemplate>
        <tr>
                  <td> <%#DataBinder.Eval(Container.DataItem, "received")%> </td>
                  <td> <%#DataBinder.Eval(Container.DataItem, "ansers")%> </td>
                  <td> <%# DataBinder.Eval(Container.DataItem, "product") %> </td>
                </tr>

            
            
        </ItemTemplate>
        </asp:Repeater>
    </form>

this is my code for aspx.vb page:

Code:

Dim Total As Integer = 0
    Protected Sub Repeater1_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles Repeater1.ItemDataBound
        Dim total2 As Decimal = 0

        If e.Item.DataItem = DataControlRowType.DataRow Then
            Total += GetUnitPrice(Convert.ToDecimal(DataBinder.Eval(e.Item.DataItem, "received")))
            total2 += GetUnitPrice(Convert.ToDecimal(DataBinder.Eval(e.Item.DataItem, "ansers")))
        ElseIf e.Item.DataItem = DataControlRowType.Footer Then

            e.Item.DataItem.cell(0).text = Total.ToString()
            e.Item.DataItem.cell(1).text = total2.ToString()





        End If
    End Sub
    Dim TotalUnitPrice As Decimal = 0.0 '''''CALULATE TOTATS FOR EACH CELL IN GRIDVIEW
    Dim TotalUnitPrice2 As Decimal = 0.0

    Function GetUnitPrice(ByVal Price As Decimal) As Decimal
        TotalUnitPrice += Price
        Return Price
    End Function
    Function GetTotal() As Decimal
        Return TotalUnitPrice
    End Function
    Function GetUnitPrice2(ByVal Price As Decimal) As Decimal
        TotalUnitPrice2 += Price
        Return Price
    End Function
    Function GetTotal2() As Decimal
        Return TotalUnitPrice2
    End Function

End Class

Any thoughts on the error, i know i'm doing this wrong, but I'm not for sure how to get around it. I'm still looking on line, but some of the things I found is a little unclear to me.

Thanks.

Quote:

Originally Posted by jmurrayhead

That is one possibility. Another possibility would be to place some labels or whatever you want to use to display the data. Then, in the ItemDataBound event, use these controls as a holding place for the count and just add to the existing value.

jmurrayhead · #10 May 2nd, 2008, 01:12 PM

You will want to check the row type like this in a repeater:

Code:

If e.Item.RowType = ListItemType.Item Or e.Item.RowType = ListItemType.AlternatingItem Then
    ....
ElseIf e.Item.RowType = ListItemType.Footer Then
    ....
End If

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

DeveloperBarn

add additional footer to gridview

add additional footer to gridview