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10.09.2008 at 08:52AM PDT, ID: 23801344
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9.3

Autopopulating textboxes in Gridview using linqdatasource

Asked by abenage in Programming for ASP.NET, Microsoft Visual Basic.Net, Language Integrated Query - LINQ

Tags:

I have several gridviews working very well with a LinqDataSource.  I am able to Insert, Update and Delete records.

In the footertemplate of one of my grids, I have created a small form to insert a new record into the database, and that is working great.  The form consists of address related textboxes such as address, city, state and zip and none of the controls are bound to any data source.

What I would like to do is provide a way for the user to simply enter a zip code in the zip code text box and have the city and state textboxes populated from a table in the DB.  When the txtZipCode control looses focus, I would like to populate the city and state text boxes with a partial post back.  I have a script manager in my master page, and the webpart I am using is wrapped in an update panel.

I have several Linq data sources.  The GridView uses ldsPersonAddresses and there is a relationship to the postal_code table which contains the zip, city, and state.  I think I could use that datasource, but I don't know how to cause the postback and use txtZipCode.Text.  I also have a stored procedure available which would return the data...

How do I bind the txtCity and txtState controls with a partial postback?Start Free Trial 
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<asp:LinqDataSource ID="ldsPersonAddresses" runat="server" ContextTypeName="VBCODE.jhadbDataClassesDataContext"
            TableName="person_addresses" Where="PersonID == @PersonID" EnableDelete="True"
            EnableInsert="True" EnableUpdate="True">
            <WhereParameters>
                <asp:QueryStringParameter Name="PersonID" QueryStringField="PersonID" Type="Int32" />
            </WhereParameters>
        </asp:LinqDataSource>
        <asp:LinqDataSource ID="ldsAddressTypes" ContextTypeName="VBCODE.jhadbDataClassesDataContext"
            TableName="address_types" runat="server">
        </asp:LinqDataSource>
        <asp:LinqDataSource ID="ldsStates" runat="server" ContextTypeName="VBCODE.jhadbDataClassesDataContext"
            TableName="states">
        </asp:LinqDataSource>
        <asp:LinqDataSource ID="ldsCountries" ContextTypeName="VBCODE.jhadbDataClassesDataContext"
            TableName="countries" runat="server">
        </asp:LinqDataSource>
        <asp:LinqDataSource ID="ldsZipCodeLookup" runat="server" 
            ContextTypeName="VBCODE.jhadbDataClassesDataContext" Select="new (City, State)" 
            TableName="postal_codes" Where="Zip == @Zip">
            <WhereParameters>
                <asp:FormParameter FormField="txtNewZip" Name="Zip" Type="String" />
            </WhereParameters>
        </asp:LinqDataSource>
[+][-]10.10.2008 at 12:44PM PDT, ID: 22690048

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About this solution

Zones: Programming for ASP.NET, Microsoft Visual Basic.Net, Language Integrated Query - LINQ
Tags: ASP.NET 2.0, VB.NET
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Solution Provided By: novynov
Participating Experts: 1
Solution Grade: A
 
 
 
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