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Thursday, 29 January 2015

Get Distinct Value From DataTable Using C#.Net and VB.Net

1/29/2015 - By Pranav Singh 0

This article will show you how you can retrieve distinct value from a datatable using c#.net. in this I will show you to get the distinct values of the datatable column.


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So for this article first we will create a new application and retrieve data from database in a datatable using c#.net and vb.net.

But first please check the table data.


C#.net
SqlConnection con = new SqlConnection(System.Configuration.
ConfigurationManager.ConnectionStrings["con"].ToString());
            try
            {
                DataTable objdt = new DataTable();
                string query = "select * from UserDetail;";
                SqlDataAdapter da = new SqlDataAdapter(query, con);
                con.Open();
                da.Fill(objdt);
                con.Close();
                if (objdt.Rows.Count > 0)
                {
                    DataView objdbview = new DataView(objdt);
                    DataTable objdistinctitem = objdbview.ToTable(true, "UserType");
                }
            }
            catch
            {
                con.Close();
            }
        }


Here in above code please check the highlighted code.  This is used for retrieving the distinct value.

                    DataView objdbview = new DataView(objdt);
                    DataTable objdistinctitem = objdbview.ToTable(true, "UserType");

Now here is the output of the code.



Now we will retrieve distinct value on the bases of multiple column. Please check the modified code. First please check the sql table data.



Now check the code

DataView objdbview = new DataView(objdt);
DataTable objdistinctitem = objdbview.ToTable(true, "UserType", "Name");

Now check the output.


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