Question

I have these two tables

Table One
CODE TITLE

KANT-015 How to Build a Brand

KANT-016 Avoiding the Workforce Crisis

KANT-017 Creating Winning Social Media Strategies

KANT-028 Be Prepared to Lead

KANT-029 The Values-Based Leader

Table Two

CODE

KANT-015

KANT-016

KANT-017

KANT-028

KANT-029

How can I merge them in one dataset to dosplay them in one grid view

This is what I have done so far

conn = new OleDbConnection(@"Provider=Microsoft.Jet.OleDb.4.0;
                                Data Source =" + Server.MapPath("App_Data\\LR Product Database 2000.mdb"));
        conn.Open();

        setOleDb = new DataSet();
        OleDbDataAdapter dbaOle = new OleDbDataAdapter("SELECT * FROM tblProducts", conn);

        dbaOle.Fill(setOleDb);
        sqlCon = new SqlConnection(ConfigurationManager.ConnectionStrings["LRVWebsite"].ToString());
        sqlCon.Open();
        dsSql = new DataSet();

        SqlDataAdapter dba = new SqlDataAdapter(@"SELECT C.CustomerFirstName,C.CustomerLastName, C.CustomerCompany,C.CustomerPosition,C.CustomerCountry,C.CustomerProvince,C.CustomerContact,CP.ActionDate,CP.ProductCode,CP.CustomerEmail FROM tblCustomers C INNER JOIN tblCustomerProducts CP ON C.CustomerEmail = CP.CustomerEmail ORDER BY ActionDate DESC", connString);
        //@"SELECT C.CustomerFirstName,C.CustomerLastName,C.CustomerCompany,C.CustomerPosition,C.CustomerCountry,C.CustomerProvince,C.CustomerContact,CP.ActionDate,CP.ProductCode,CP.CustomerEmail FROM tblCustomers C INNER JOIN tblCustomerProducts CP ON C.CustomerEmail = CP.CustomerEmail ORDER BY ActionDate DESC", connString);
        dba.Fill(dsSql);

        dsSql.Merge(setOleDb);

        GridView1.DataSource = dsSql;
        GridView1.DataBind();


        sqlCon.Close();

Answer 1

You’re missing a PK, the merge happens on a PK.

Set one on both tables:

setOleDb.Tables[0].PrimaryKey = setOleDb.Tables[0].Columns["CODE"];