How to Bind DataGridView to LINQ (var)


On 19th May 2008, I posted this to newsgroup:


Hello all,

I have the following code:

    public void displayProducts()




        productsAdapter = new OracleDataAdapter();

        string strSQL = "SELECT * FROM tblSubRecieve";

        productsAdapter.SelectCommand = new OracleCommand(strSQL, conn);

        productsDataSet = new DataSet("productsDataSet");

        productsAdapter.Fill(productsDataSet, "Products");

        var vPro = productsDataSet.Tables["Products"].AsEnumerable();

        var vPro1 =

                    from p in vPro

                    where p.Field<string>("PROD_ID") == txtProdID.Text

                    select p;

        productsDataGrid.DataSource = vPro1;       


I am sure vPro1 consist of 2 rows of data but the Datagridview cannot display anything.

Do I have to cast the var back to Datatable before bind it?


On the same date Frank Dzaebel replied:


Although this would be possible, you would have the known weaknesses in DataBinding-scenarios with List<T>, so normally its a better way here to bind to a DataView:

   productsDataGrid.DataSource = vPro1.AsDataView();


So the key here is the AsDataView() method. I have tried and it works fine on me.

About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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