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How do you read values from a SQLDataSource and use in a 'FOR EACH' statement?

Posted on 2007-12-02
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Last Modified: 2008-02-01
In code behind, how do I read a SqlDataSource list of values to use a for/next loop (as designated as "TargetList" in the snippet below)? I may not have the right DIM for the TargetList. Right now, I receive an error saying that the TargetList.DataSource = PromoList part is not a member of the System.Collection.ArrayList.

Thanks.
		Dim TargetList As ArrayList

		Dim i As Integer

 

		Dim PromoList As SqlDataSource

		PromoList.ConnectionString = "<%$ ConnectionStrings:SiteSqlServer%>"

		PromoList.SelectCommandType = SqlDataSourceCommandType.StoredProcedure

		PromoList.SelectCommand = "GetPromoList"

		PromoList.DataBind()

 

		TargetList.DataSource = PromoList

		TargetList.DataValueField = "PromoID"

		TargetList.DataBind()

 

 

For i = 0 To TargetList.Items.Count - 1

 

            If TargetList.Items(i).Selected Then

 

                cmd.Parameters("@ProdID").Value = Convert.ToInt16(TargetList.Items(i).Value)

 

                cmd.ExecuteNonQuery()

 

            End If

 

        Next

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Question by:barnesco
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5 Comments
 
LVL 16

Expert Comment

by:McExp
ID: 20392391
The Simplest and in my opinion correct solution is to not use the SqlDataSource.

See below for an example using SqlConnection and SqlCommand: -
Dim myReader as SqlDataReader

    Dim mySqlConnection as SqlConnection

    Dim mySqlCommand as SqlCommand
 
 

    mySqlConnection = new SqlConnection("server=(local)\NetSDK;Trusted_Connection=yes;database=northwind")

    mySqlCommand = new SqlCommand("select * from customers", mySqlConnection)
 

    try

      mySqlConnection.Open()

      myReader = mySqlCommand.ExecuteReader()
 

      Console.Write("Customer ID    ")

      Console.WriteLine("Company Name")
 

      do while (myReader.Read())

        Console.Write(myReader("CustomerID").ToString() + "    ")

        Console.WriteLine(myReader("CompanyName").ToString())

      loop

    catch e as Exception

      Console.WriteLine(e.ToString())

    finally

      if Not (myReader is Nothing)

        myReader.Close()

      end if
 

      if (mySqlConnection.State = ConnectionState.Open)

        mySqlConnection.Close()

      end if

    end try

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Author Comment

by:barnesco
ID: 20392580
I have many values from a field that are being returned. How would you assign a list of values from the datareader?

This substitute for:

Console.Write(myReader("CustomerID").ToString() + "    ")
Console.WriteLine(myReader("CompanyName").ToString())
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LVL 16

Expert Comment

by:McExp
ID: 20392676
I don't understand your question.
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Author Comment

by:barnesco
ID: 20393051
I need to return the values to an arraylist or a list of some sort. It's easy to return them to a ddl or some other control, but I need to put those values somewhere so that I can access them for a for/next loop.
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LVL 16

Accepted Solution

by:
McExp earned 500 total points
ID: 20397264
create a new List and then add new items to it during the while loop which iterates over the returned data
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