ds. relations problem with dataset

[kjewell23]

Hi. I have the code working just fine except all the data isn't coming up with the ds.relations code. Could you see what I'm doing wrong or what else I need to add. Code down below
Dim adapter As OdbcDataAdapter = New OdbcDataAdapter(command)
Dim ds As DataSet = New DataSet()
adapter.SelectCommand = New OdbcCommand("select rmsfiles2.obcop200.line#, rmsfiles2.obcop200.ordno, rmsfiles2.obcop200.quano, rmsfiles2.obcop200.quana, rmsfiles2.obcop200.quans, rmsfiles2.obcop200.c2rdt, rmsfiles2.obcop200.unitm, rmsfiles2.obcop200.actsp, rmsfiles2.obcop200.prdno from rmsfiles2.obcop200 where ordno = " & Order.ToString(), myConnection)
adapter.Fill(ds, "OBCOP200")

adapter.SelectCommand = New OdbcCommand("select rmsfiles2.mspmp100.ptyp1, rmsfiles2.mspmp100.ptyp2, rmsfiles2.mspmp100.descp, rmsfiles2.mspmp100.prdno from rmsfiles2.obcop200 inner join rmsfiles2.mspmp100 on rmsfiles2.obcop200.prdno = rmsfiles2.mspmp100.prdno where rmsfiles2.obcop200.ordno = " & Order.ToString(), myConnection)
adapter.Fill(ds, "MSPMP100")

ds.Tables(0).TableName = "OBCOP200"
ds.Tables(1).TableName = "MSPMP100"
Dim relation As New DataRelation("OBCOP200MSPMP100", ds.Tables("OBCOP200").Columns("prdno"), ds.Tables("MSPMP100").Columns("prdno"), False)
' ds.Relations.Add("OBCOP200MSPMP100", ds.Tables("OBCOP200").Columns("prdno"), ds.Tables("MSPMP100").Columns("prdno"), True)
ds.Relations.Add(relation)

gridview1.DataSource = ds
gridview1.DataBind()
If ds.Tables(0).Rows.Count = 0 Then
lbl_error.Visible = True
gridview1.Visible = False
Else
lbl_error.Visible = False
gridview1.Visible = True
End If

If ds.Tables(1).Rows.Count = 0 Then
lbl_error.Visible = True
gridview1.Visible = False
Else
lbl_error.Visible = False
gridview1.Visible = True
End If

[davef]

The code looks alright to me. What's the error you're getting again?

[kjewell23]

thats the thing I'm not getting no error I'm not getting 3 columns that I need from the table

The code looks alright to me. What's the error you're getting again?

[davef]

thats the thing I'm not getting no error I'm not getting 3 columns that I need from the table

Which columns are missing from the dataset?

[kjewell23]

There are the ptyp1, ptyp2, and the descp fields that are missing.

Which columns are missing from the dataset?

[davef]

There are the ptyp1, ptyp2, and the descp fields that are missing.

Is your gridview supposed to have hierarchical Master-Detail structure?

[kjewell23]

I don't know. Does it

Is your gridview supposed to have hierarchical Master-Detail structure?

[davef]

I don't know. Does it

I could post the code that builds a Master-Detail DataGrid if that would help your problem.

[kjewell23]

I could post the code that builds a Master-Detail DataGrid if that would help your problem.

sure it wouldn't hurt to try it. I have a gridview not a datagrid

[davef]

sure it wouldn't hurt to try it. I have a gridview not a datagrid

You must have Nortwind SQL Server db installed for this sample to run. Place a DataGrid (not DataGridView) object on the form. Here's you Form_Load event handler implementation:

        private void Form1_Load( object sender, EventArgs e )
        {
            string szConn = "Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=Northwind;Data Source=server-name";
            string szSQL = "select * from dbo.Categories";
            SqlConnection conn = new SqlConnection( szConn );
            SqlCommand command = new SqlCommand( szSQL );
 
            if( conn.State != ConnectionState.Open )
                conn.Open();
 
            command.Connection = conn;
            SqlDataAdapter adapter = new SqlDataAdapter( command );
            DataSet ds = new DataSet();
            adapter.Fill( ds, "Categories" );
 
            szSQL = "select * from Products";
            command.CommandText = szSQL;
            adapter.Fill( ds, "Products" );
 
            DataRelation relation = new DataRelation(
                "CategoryProduct", ds.Tables["Categories"].Columns["CategoryID"],
                ds.Tables["Products"].Columns["CategoryID"], true );
            ds.Relations.Add( relation );
 
 
            this.dataGrid1.DataSource = ds;
            this.dataGrid1.DataMember = "Categories";
            conn.Close();
        }
 

[kjewell23]

I don't have that installed on my machine so It don't help me. Its all the same code except the sql commands and of course the tables

You must have Nortwind SQL Server db installed for this sample to run. Place a DataGrid (not DataGridView) object on the form. Here's you Form_Load event handler implementation:

        private void Form1_Load( object sender, EventArgs e )
        {
            string szConn = "Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=Northwind;Data Source=server-name";
            string szSQL = "select * from dbo.Categories";
            SqlConnection conn = new SqlConnection( szConn );
            SqlCommand command = new SqlCommand( szSQL );
 
            if( conn.State != ConnectionState.Open )
                conn.Open();
 
            command.Connection = conn;
            SqlDataAdapter adapter = new SqlDataAdapter( command );
            DataSet ds = new DataSet();
            adapter.Fill( ds, "Categories" );
 
            szSQL = "select * from Products";
            command.CommandText = szSQL;
            adapter.Fill( ds, "Products" );
 
            DataRelation relation = new DataRelation(
                "CategoryProduct", ds.Tables["Categories"].Columns["CategoryID"],
                ds.Tables["Products"].Columns["CategoryID"], true );
            ds.Relations.Add( relation );
 
 
            this.dataGrid1.DataSource = ds;
            this.dataGrid1.DataMember = "Categories";
            conn.Close();
        }
 

[davef]

I don't have that installed on my machine so It don't help me. Its all the same code except the sql commands and of course the tables

A DataGridView is not hierarchical by design so you can present the contents of only one table of the dataset at a time. Try to set the DataMember property to the specific table and massage the data beforehand.

[kjewell23]

A DataGridView is not hierarchical by design so you can present the contents of only one table of the dataset at a time. Try to set the DataMember property to the specific table and massage the data beforehand.

well i added the datamember to the first table between the datasource and databind. the massage part i dont' know what you are talking about

[davef]

well i added the datamember to the first table between the datasource and databind. the massage part i dont' know what you are talking about

Does your first datatable contain the fields you're missing from the grid now?

[kjewell23]

the fields that im missing is in the second table i tried both tables for the datamember and still missing

Does your first datatable contain the fields you're missing from the grid now?