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Trying to convert PL/SQL developer into VB Studio SQL.

In PL/SQL I can execute:

AND TO_CHAR(SUBSTR(CM.DATA,to_char(instr(,'^^^')+3),4)) = &chute

When SQL is executed a popup will allow me to enter chute number and data is populated.

Just looking for VB equivilent.
Posted 24-Apr-13 1:50am
Updated 24-Apr-13 5:17am
Maciej Los254.5K
ryanb31 24-Apr-13 8:01am
Where will this be used? In a web app? In a Windows Form? In SMS? Just use parameters but they won't be popups unless you execute the SP in SMS.
Chris Simmonds 24-Apr-13 8:53am
Eventually will be used as a single windows form. Just working out Proof of concept before creating forms.

1 solution

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Solution 1

There is no "popup" like PL/SQL in SQL statements in VB .NET code.

Your user enters the value to be found in a TextBox on the form. You use that TextBox value as a parameter to the SQL statement. In my example, I trim spaces from the beginning and end of the TextBox value because sometimes users accidentally enter them.

@CHUTE in the SQL statement below is the placeholder for the parameter.
The parameter value is put into a SqlParameter object. The SqlParameter object is added to the SqlCommand object.

Here is an example:

    Dim cn As New SqlConnection
    Dim obCommand As SqlCommand
    Dim rs As SqlDataReader
    '.... open the connection ...
    cn.ConnectionString = "Your Connection String"

    Dim obCommand As SqlCommand
    Const SQL_SELECT As String = "SELECT col1,col2,col3 FROM table1 WHERE col1=@CHUTE;"
    obCommand = New SqlCommand(SQL_SELECT, cn) ' Instantiate SqlCommand object
    Dim obParm As New SqlParameter
    Dim strChute As String=TextBox1.Text.Trim ' Remove front and back spaces
       obParm.ParameterName = "CHUTE"     ' Name of @ parameter in the SQL statement
       obParm.SqlDbType = SqlDbType.NVarChar ' Data Type
       obParm.Size = strChute.Length      ' Size of parameter
       obParm.Value = strChute            ' Parameter value
       obCommand.Parameters.Add(obParm)   ' Add to SqlCommand object
       obParm = Nothing
       rs = obCommand.ExecuteReader       ' Execute SQL statement
       If rs.HasRows Then
           While rs.Read                  ' Retrieve a row
           End While
       End If
     Catch myException As SqlException
        Call ShowSQLException(myException)
     Catch myException As Exception
        MsgBox(myException.Message, MsgBoxStyle.Critical, "Caption")
        End Try
        End Try
        End Try
     End Try

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