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BOOK: Beginning VB.NET 2nd Edition/Beginning VB.NET 2003
This is the forum to discuss the Wrox book Professional VB.NET 2003 by Bill Evjen, Billy Hollis, Rockford Lhotka, Tim McCarthy, Jonathan Pinnock, Rama Ramachandran, Bill Sheldon; ISBN: 9780764559921
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Old January 14th, 2004, 03:04 AM
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Default Rest of code for Chapter 17

The only code in the code download for chapter 17 is the Client-Server Processing project. I need the code for the DataGrid Updates project on page 711. Where can I get the code, As I am having allot of problems?

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Old March 6th, 2004, 05:32 PM
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Im having the exact same problem!! :( I've written the the DataGrid Updates example out about 5 times from start to finish and keep getting a blank page when i load it. I have taken out the @page. If u do get it working can u post the code pls:D Cheers!!!!

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Old August 31st, 2004, 06:47 PM
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I noticed a lot of people have had lots of problems with chapter 17. Here is my code for the DataGrid Updates example. It is fully functionaly, after several hours of debugging typos :), so I hope it helps. Sorry about the formatting as it wraps around in some places as I just copy and pasted the code from the aspx document.

Webform1.aspx

<%@ Import Namespace="System.Data.SqlClient"%>
<%@ Import Namespace="System.Data"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
    <HEAD>
        <title>DataGrid Updates</title>
        <meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
        <meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
        <meta name="vs_defaultClientScript" content="VBScript">
        <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
    </HEAD>
    <script runat=server language=vb>
    Dim objConnection as SqlConnection
    sub Page_Load(Sender as Object, E as EventArgs)
        objConnection=new SqlConnection("Server=(local);Initial Catalog=Pubs;User ID=sa;Password=pheonix;")
        If not (IsPostBack)
            BindGrid()
        End If
    End Sub
    Sub BindGrid()
        Dim objDataSet as DataSet
        dim objDataAdapter as SqlDataAdapter
        objDataAdapter = New SqlDataAdapter ( _
            "SELECT au_lname, au_fname, titles.title_id, title, price " & _
            "From authors " & _
            "Join titleauthor on authors.au_id=titleauthor.au_id " & _
            "Join titles on titleauthor.title_id = titles.title_id " & _
            "Order by au_lname, au_fname" , objConnection)
        objDataSet= new DataSet
        objDataAdapter.Fill(objDataSet, "authors")

        grdAuthors.DataSource=objDataSet
        grdAuthors.DataBind()
    End Sub
    Sub EditGridData(Sender as Object, E as DataGridCommandEventArgs)
        grdAuthors.EditItemIndex = CInt(e.item.itemindex)
        BindGrid()
    End Sub
    Sub CancelGridData(Sender as Object, E as DataGridCommandEventArgs)
        grdAuthors.EditItemIndex = -1
        BindGrid()
    End Sub
    Sub UpdateGridData(Sender as Object, E as DataGridCommandEventArgs)
        Dim objCommand as SqlCommand
        dim objTextBox as TextBox
        Dim strSql as string= "Update titles Set title=@Title, price=@Price where title_id=@ID"

        objCommand=New SqlCommand(strSql, objConnection)
        objCommand.Parameters.Add(New SqlParameter("@ID", SqldbType.VarChar, 66))
        objCommand.Parameters.Add(New SqlParameter("@Title", SqldbType.VarChar, 80))
        objCommand.Parameters.Add(New SqlParameter("@Price", SqldbType.Money, 6))
        objCommand.Parameters("@ID").Value=grdAuthors.Data Keys(CInt(E.Item.ItemIndex))
        objTextBox=E.Item.FindControl("edit_title")
        objCommand.Parameters("@Title").Value=objTextBox.T ext
        objTextBox=E.Item.FindControl("edit_price")

        If Left(objTextBox.Text,1) = "$" Then
            objTextBox.Text= Right(objTextBox.Text, Len(objTextBox.Text)-1)
        End If
        objCommand.Parameters("@Price").Value=objTextBox.T ext
        objCommand.Connection.Open()
        objCommand.ExecuteNonQuery()
        grdAuthors.EditItemIndex = -1
        objCommand.Connection.Close()
        BindGrid()
    End Sub

    </script>

    <body MS_POSITIONING="GridLayout">
        <form id="Form1" method="post" runat="server">
            <asp:DataGrid id="grdAuthors" style="Z-INDEX: 101; LEFT: 16px; POSITION: absolute; TOP: 40px"
                runat="server" Width="424px" Height="256px"
                AutoGenerateColumns="False"
                CellPadding="3"
                DataKeyField="title_id"
                Font-Names="Verdana"
                Font-Size="8pt"
                GridLines="None"
                AlternatingItemStyle-BackColor="WhiteSmoke"
                HeaderStyle-Font-Bold="True"
                HeaderStyle-ForeColor="White"
                HeaderStyle-BackColor="Maroon"
                OnEditCommand="EditGridData"
                OnCancelCommand="CancelGridData"
                OnUpdateCommand="UpdateGridData">
                <Columns >
                    <asp:EditCommandColumn
                        EditText="Edit Row"
                        CancelText="Cancel Edit"
                        UPdateText="Update Row"
                        ItemStyle-Wrap="False"/>
                    <asp:BoundColumn DataField="title_id" Visible=False />
                    <asp:BoundColumn DataField="au_lname" HeaderText="Last Name" ReadOnly=True ItemStyle-Wrap=False/>
                    <asp:BoundColumn DataField="au_fname" HeaderText ="First Name" ReadOnly=True ItemStyle-Wrap=False />
                    <asp:TemplateColumn HeaderText="title" ItemStyle-Wrap=False >
                        <ItemTemplate >
                            <asp:Label Runat=server Text='<%# DataBinder.Eval (Container.DataItem, "title") %>'/>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:TextBox Runat=server ID="edit_title" Font-Name="Verdana" Font-size="8pt" Width="400" Text='<%# DataBinder.Eval (Container.DataItem, "title") %>'/>
                        </EditItemTemplate>
                    </asp:TemplateColumn>
                    <asp:TemplateColumn HeaderText="Price" HeaderStyle-Font-Bold=True ItemStyle-HorizontalAlign=Right>
                        <ItemTemplate>
                            <asp:Label Runat=server Text='<%# DataBinder.Eval (Container.DataItem, "price", "{0:C2}") %>'/>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:TextBox Runat=server ID="edit_price" Font-Name="Verdana" Font-Size="8pt" Width="50" Text='<%# DataBinder.Eval (Container.DataItem, "price", "{0:C2}") %>'/>
                        </EditItemTemplate>
                    </asp:TemplateColumn>
                </Columns>

            </asp:DataGrid>
        </form>
    </body>
</HTML>


 


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