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data access component - project doesn't access method correctly

Posted on 2004-09-14
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Last Modified: 2010-04-23
I made a component of several dataadapters and a dataset.  I also included a public method:

Public class cmpITdata
Public Sub LoadData(ByVal ds As DataSet)
        daVendors.Fill(Ds, "spSelVendors")
        daInvoices.Fill(Ds, "spSelInvoices")
        daBudCat.Fill(Ds, "spSelBudCat")
        daSubCat.Fill(Ds, "spSelSubCat")
        daPurchases.Fill(Ds, "spSelPurchases")
End Sub
End class

When I call the method in my project, I reference it as follows:

cmditdata.loaddata(dsbuddata)

I added a datagrid to the form and specified the datasource as dsbuddata, datamember as spselvendors, and the datakeyfield as vendorid.

In the pageload event I call the databind method on the datagrid (dgVendors.databind) (of course I do this after calling the LoadData procedure).

When I run the project, no data appears in the datagrid.  However, if, instead of calling the loaddata procedure, I do the following, it works:

cmdITdata.daVendors.fill(dsbuddata, "spselvndors")
dgVendors.databind

This is my first component so i'm sure I'm doing something wrong here!  Any help would be much appreciated.  Thanks!
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Question by:tsbathe
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Accepted Solution

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123654789987 earned 250 total points
ID: 12061609
What are spSelVendors?

1.  U can get data from a table in the database like this

Public Sub CreateSqlConnection() as Dataset
    Dim myConnection As New SqlConnection()
    myConnection.ConnectionString = "Persist Security Info=False;Integrated Security=SSPI;database=northwind;server=mySQLServer;Connect Timeout=30"
    myConnection.Open()
mycommand.connection = myConnection;
myCommand.CommandText = "SELECT * FROM Emp ORDER BY EmpNo"
    myCommand.CommandType = CommandType.Text
Dataset ds = ExecuteDataset(myCommand)
return ds;
End Sub

2. Then u have to fill dataAdapter

dataAdapater1.Fill(ds);

3. Datagrid1.Datasource = ds.Tables[0]; or
Datagris1.SetDataBinding(ds,"VendorId"); here VendorId is the datamember

See this example

http://www.c-sharpcorner.com/database/data_view_1.asp




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Author Comment

by:tsbathe
ID: 12064027
spSelVendors is the name of the select statement of the data adapter daVendors, a stored procedure.  Tables in my dataset are listed as the names of the select statements of my data adapters.  I already have my sqlconnection setup in design mode....I just need to know how to correctly access a public method that is in a component...
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Author Comment

by:tsbathe
ID: 12209995
I still need help with this issue, anyone have any ideas?
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