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09/18/2009 at 07:00AM PDT, ID: 24743211
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8.2

datlist will not update content of dropdown list

Asked by jwoodhams in Microsoft IIS Web Server, Programming for ASP.NET

Can anyone tell me what I am missing here.  I have a detailsView control, it inserts everything fine but, doing an update will not update a change in the dropdown list. The error I get is that the control is not found.  Any thoughts?  HEre is my code: 
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DETAILSVIEW:
 
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False"
        DataKeyNames="ID" DataSourceID="SqlDataSource1" EnableViewState="False" Width="340px" 
                    BorderStyle="None" CssClass="rightblock">
        <PagerTemplate>
            &nbsp;
        </PagerTemplate>
        <RowStyle HorizontalAlign="Right" BorderStyle="None" VerticalAlign="Top" />
        <Fields>
            <asp:CommandField ButtonType="Button" ShowEditButton="True" ShowInsertButton="True" />
            <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False"
                ReadOnly="True" SortExpression="ID">
                <HeaderStyle Width="35%" />
                <ItemStyle HorizontalAlign="Left" />
            </asp:BoundField>
            <asp:TemplateField HeaderText="Cat" SortExpression="intCategory">  
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Bind("intCategory") %>'></asp:Label>
                </ItemTemplate>
                <EditItemTemplate>
                        <asp:DropDownList ID="ddlCategory" runat="server" DataSourceID="ddlCategoryDataSource"
                        DataTextField="Category" DataValueField="ID">
                        </asp:DropDownList>
                </EditItemTemplate>
                <InsertItemTemplate>
                    <asp:DropDownList ID="ddlCategoryInsert" runat="server"
                        DataSourceID="ddlCategoryDataSource" DataTextField="Category" 
                        DataValueField="ID">
                    </asp:DropDownList>
                </InsertItemTemplate>
                <ItemStyle HorizontalAlign="Left" />
                
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Price Cat" SortExpression="intPriceCategory">
                <ItemTemplate>
                    <asp:Label ID="Label2" runat="server" Text='<%# Bind("intPriceCategory") %>'></asp:Label>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox2" runat="server" 
                        Text='<%# Bind("intPriceCategory") %>'></asp:TextBox>
                </EditItemTemplate>
                <InsertItemTemplate>
                    <asp:TextBox ID="TextBox2" runat="server" 
                        Text='<%# Bind("intPriceCategory") %>'></asp:TextBox>
                </InsertItemTemplate>
                <ItemStyle HorizontalAlign="Left" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Brand" SortExpression="chrBrand">
                <ItemTemplate>
                    <asp:Label ID="Label3" runat="server" Text='<%# Bind("chrBrand") %>'></asp:Label>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("chrBrand") %>'></asp:TextBox>
                </EditItemTemplate>
                <InsertItemTemplate>
                    <asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("chrBrand") %>'></asp:TextBox>
                </InsertItemTemplate>
                <ItemStyle HorizontalAlign="Left" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Mfg Number" SortExpression="chrNumber">
                <ItemTemplate>
                    <asp:Label ID="Label4" runat="server" Text='<%# Bind("chrNumber") %>'></asp:Label>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("chrNumber") %>'></asp:TextBox>
                </EditItemTemplate>
                <InsertItemTemplate>
                    <asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("chrNumber") %>'></asp:TextBox>
                </InsertItemTemplate>
                <ItemStyle HorizontalAlign="Left" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Price" SortExpression="Price">
                <ItemTemplate>
                    <asp:Label ID="Label5" runat="server" Text='<%# Bind("Price") %>'></asp:Label>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox5" runat="server" Text='<%# Bind("Price") %>'></asp:TextBox>
                </EditItemTemplate>
                <InsertItemTemplate>
                    <asp:TextBox ID="TextBox5" runat="server" Text='<%# Bind("Price") %>'></asp:TextBox>
                </InsertItemTemplate>
                <ItemStyle HorizontalAlign="Left" />
            </asp:TemplateField>
        </Fields>
        <EditRowStyle BorderStyle="None" />
    </asp:DetailsView>
 
SQLDATASOURCE:
 
 <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DatabaseConnectionString %>"
        DeleteCommand="DELETE FROM [tblFrames] WHERE [ID] = @ID" 
        InsertCommand="INSERT INTO tblFrames(intCategory, intPriceCategory, chrBrand, chrNumber, Price) 
                       VALUES (@intCategory, @intPriceCategory, @chrBrand, @chrNumber, @Price)"
        SelectCommand="SELECT ID, intCategory, intPriceCategory, chrBrand, chrNumber, Price FROM tblFrames WHERE (ID = @ID)"
        
        UpdateCommand="UPDATE tblFrames SET intCategory = @intCategory, intPriceCategory = @intPriceCategory, 
                       chrBrand = @chrBrand, chrNumber = @chrNumber, Price = @Price WHERE (ID = @ID)">
        <SelectParameters>
            <asp:QueryStringParameter Name="ID" QueryStringField="bid" />
        </SelectParameters>
        <DeleteParameters>
            <asp:Parameter Name="ID" Type="Int32" />
        </DeleteParameters>
        <UpdateParameters>
            <asp:Parameter Name="intCategory" Type="Int32" />
            <asp:Parameter Name="intPriceCategory" Type="Int32" />
            <asp:Parameter Name="chrBrand" Type="String" />
            <asp:Parameter Name="chrNumber" Type="String" />
            <asp:Parameter Name="Price" Type="Decimal" />
            <asp:Parameter Name="ID" Type="Int32" />
        </UpdateParameters>
        <InsertParameters>
            <asp:Parameter Name="intCategory" Type="Int32" />
            <asp:Parameter Name="intPriceCategory" Type="Int32" />
            <asp:Parameter Name="chrBrand" Type="String" />
            <asp:Parameter Name="chrNumber" Type="String" />
            <asp:Parameter Name="Price" Type="Decimal" />
        </InsertParameters>
    </asp:SqlDataSource>
 
CODE BEHIND:
 
Protected Sub DetailsView1_ItemUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewUpdateEventArgs) Handles DetailsView1.ItemUpdating
        Dim intCategory As Integer
        intCategory = CType(Me.DetailsView1.FindControl("ddlCategoryInsert"), DropDownList).SelectedValue
        SqlDataSource1.UpdateParameters("intCategory").DefaultValue = intCategory
    End Sub
 
Protected Sub DetailsView1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles DetailsView1.Load
        Dim cat As String
        cat = Request.QueryString("Category")
        CType(Me.DetailsView1.FindControl("ddlCategory"), DropDownList).SelectedValue = cat
 
    End Sub
 
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[+][-]09/18/09 07:53 AM, ID: 25366610

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About this solution

Zones: Microsoft IIS Web Server, Programming for ASP.NET
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Solution Provided By: arhame
Participating Experts: 1
Solution Grade: A
 
 
[+][-]09/21/09 05:34 AM, ID: 25382218

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