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DetailsView, swap textbox for dropdownlist, not inserting through sqldatasource

Posted on 2009-05-06
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Last Modified: 2012-05-06
Hi,

I am using a details view to run inserts on a sql database. One of the 3 columns I am inserting to in a int. By default the details view generates a textbox - I have changed that through the designer to a drop down box and used a sql data source inside the row template to populate with a choice of options.

when I run the code and fill in the details, select an option from the drop down list I've created, the databaes is not being populated? any ideas?
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" 
            BackColor="LightGoldenrodYellow" BorderColor="Tan" BorderWidth="1px" 
            CellPadding="2" DataKeyNames="ID" DataSourceID="TestDS" DefaultMode="Insert" 
            ForeColor="Black" GridLines="None" Height="50px" Width="500px" 
            oniteminserted="ForwardPage" >
            <FooterStyle BackColor="Tan" />
            <PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" 
                HorizontalAlign="Center" />
            <Fields>
                <asp:BoundField DataField="ID" HeaderText="ID" SortExpression="ID" 
                    InsertVisible="False" ReadOnly="True">
                </asp:BoundField>
                <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
                <asp:TemplateField HeaderText="BodyText" SortExpression="BodyText">
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("BodyText") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <InsertItemTemplate>
                        <asp:TextBox ID="TextBox1" runat="server" Height="300px" 
                            Text='<%# Bind("BodyText") %>' TextMode="MultiLine" Width="450px"></asp:TextBox>
                    </InsertItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%# Bind("BodyText") %>'></asp:Label>
                    </ItemTemplate>
                    <HeaderStyle VerticalAlign="Top" />
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Language" SortExpression="Lang">
                    <EditItemTemplate>
                        <asp:TextBox ID="dropdownlist1" runat="server" Text='<%# Bind("Lang") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <InsertItemTemplate>
                        <asp:DropDownList ID="Textbox3" runat="server" AppendDataBoundItems="True" 
                            DataSourceID="SqlDataSource1" DataTextField="Languages" 
                            DataValueField="ID" SelectedValue='<%# Bind("Lang") %>'>
                            <asp:ListItem Text="Select a language" Value="-1" />
                        </asp:DropDownList>
                        &nbsp;<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
                            ConnectionString="<%$ ConnectionStrings:###############3 %>" 
                            SelectCommand="SELECT [ID], [Languages] FROM [Languages] ORDER BY [Languages]">
                        </asp:SqlDataSource>
                    </InsertItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label2" runat="server" Text='<%# Bind("Lang") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:CommandField ButtonType="Button" InsertText="Save testimonial" 
                    ShowCancelButton="False" ShowInsertButton="True" />
            </Fields>
            <HeaderStyle BackColor="Tan" Font-Bold="True" />
            <InsertRowStyle BackColor="LightGoldenrodYellow" />
            <EditRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />
            <AlternatingRowStyle BackColor="PaleGoldenrod" />
        </asp:DetailsView>
        <asp:SqlDataSource ID="TestDS" runat="server" 
            ConnectionString="<%$ ConnectionStrings:################# %>" 
            DeleteCommand="DELETE FROM [Testimonials] WHERE [ID] = @ID" 
            InsertCommand="INSERT INTO [Testimonials] ([Title], [BodyText], [Lang]) VALUES (@Title, @BodyText, @Lang)"
            SelectCommand="SELECT * FROM [Testimonials]" 
            
            UpdateCommand="UPDATE [Testimonials] SET [Title] = @Title, [BodyText] = @BodyText [Lang]=@Lang WHERE [ID] = @ID" 
            EnableViewState="False">
            <DeleteParameters>
                <asp:Parameter Name="ID" Type="Int32" />
            </DeleteParameters>
            <UpdateParameters>
                <asp:Parameter Name="Title" Type="String" />
                <asp:Parameter Name="BodyText" Type="String" />
                <asp:Parameter Name="ID" Type="Int32" />
            </UpdateParameters>
            <InsertParameters>
                <asp:Parameter Name="Title" Type="String" />
                <asp:Parameter Name="BodyText" Type="String" />
                <asp:ControlParameter ControlID="DetailsView1" DbType="Int32" Name="Lang" 
                    PropertyName="SelectedValue" Type="Int32" />
            </InsertParameters>
        </asp:SqlDataSource>

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Question by:CJMilner
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6 Comments
 
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Accepted Solution

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Christian de Bellefeuille earned 1500 total points
ID: 24320817
You don'T get any error?

First:
Your have a DropDownList named "Textbox3" (i would suggest to rename it to ddlLanguage).

Second:
In your insertParameters, you have written: ControlID="DetailsView1"...
It should be ControlID="ddlLanguage"?

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by:CJMilner
ID: 24320997
Thanks for your comment.

I don't get an error the page just reloads with empty textboxes and no entry in to the database, I've rebuild the page and now I get the an entry in the database but just no content in the Lang column. My lang field of the details view is a template build, added from scratch with a default named dropdownlist, and a gui added datasource for the language selections.

It seems that I'm missing somewhere to tell the insert query to collect the lang column from the dropdown list in the template field I've just added - how do I do that?!

Thanks in advance.
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Expert Comment

by:Christian de Bellefeuille
ID: 24321161
Can you show me your latest code?

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Author Comment

by:CJMilner
ID: 24321189
I got annoyed with it not working using the VS2008 control's, so I just deleted the details view and created the textboxes (and drop down) manuall, then bound them to the sql data source.

This is working code below.
<table>
            <tr>
                <th>Title</th>
                <td><asp:TextBox runat="server" ID="txtTitle" Width="450px"></asp:TextBox></td>
            </tr>
            <tr>
                <th valign="top">Body</th>
                <td><asp:TextBox runat="server" Width="450px" Height="250px" ID="txtBody" 
                        TextMode="MultiLine"></asp:TextBox></td>
            </tr>
            <tr>
                <th>Language</th>
                <td>
                    <asp:DropDownList ID="ddlLanguage" runat="server" 
                    DataSourceID="SqlDataSource1" DataTextField="Languages" 
                    DataValueField="ID" AppendDataBoundItems="True">
                        <asp:ListItem Text="Select a language" Value="-1" />
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
                    ConnectionString="<%$ ConnectionStrings:############### %>" 
                    SelectCommand="SELECT [ID], [Languages] FROM [Languages] ORDER BY [Languages]" 
                        oninserted="ForwardToTestimonials">
                    </asp:SqlDataSource>
                </td>
            </tr>
        </table>
        <asp:Button ID="btnInsert" runat="server" Text="Insert testimonial" 
        onclick="SaveTestimonial" />
    <p>
        <asp:SqlDataSource ID="TestimonialsDS" runat="server" 
            ConnectionString="<%$ ConnectionStrings:################ %>" 
            InsertCommand="INSERT INTO Testimonials(Title, BodyText, Lang) VALUES (@Title, @BodyText, @Lang)" 
            SelectCommand="Select * from Testimonials">
            <InsertParameters>
                <asp:ControlParameter ControlID="txtTitle" Name="Title" PropertyName="Text" />
                <asp:ControlParameter ControlID="txtBody" Name="BodyText" PropertyName="Text" />
                <asp:ControlParameter ControlID="ddlLanguage" Name="Lang" 
                    PropertyName="SelectedValue" />
            </InsertParameters>
        </asp:SqlDataSource>
    </p>

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Expert Comment

by:Christian de Bellefeuille
ID: 24321346
I know its a little late, but here's your solution.
http://www.experts-exchange.com/Programming/Languages/.NET/ASP.NET/Q_23171694.html

Sorry for the late answer... but i'm not a give up :P.

The DropDown control can't be seen from outside the DetailView.  This is why its not working with the ControlParameter.    So if you want to use it in a DetailView, you have to trap the Inserting event of your datasource, and in this event you call the FindControl to find your drop down in the detailview, and Insert its value as a parameter like this:




Private Sub ds1_Inserting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceCommandEventArgs) Handles TestimonialsDS.Inserting
        e.Command.Parameters("@Lang").Value = CType(DetailsView1.FindControl("ddlLanguage"), DropDownList).SelectedValue
End Sub

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Author Comment

by:CJMilner
ID: 24321397
I see and understand, thanks for the answer. Noted for next time! :)
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