DbScript Class

In This Topic

Serves to execute series of SQL statements separated by special symbols.

Syntax

Visual Basic
C#

'Declaration
 
Public MustInherit Class DbScript 
   Inherits System.ComponentModel.Component
   Implements System.ComponentModel.IComponent, System.IDisposable

public abstract class DbScript : System.ComponentModel.Component, System.ComponentModel.IComponent, System.IDisposable

Remarks

Use DbScript to consecutively execute several SQL statements stored in ScriptText property. DbScript allows to execute them all at once or one by one. You can use Progress event to monitor execution flow and Error to catch errors.

There are three ways to execute a script:

- using Execute method;

- using ExecuteNext method;

- using SqlStatement.SqlStatement.Execute method.

For more information refer to corresponding method.

Example

This sample demonstrates how to execute script and retrieve information about execution flow using Progress and Error events.

csharp

[STAThread]
static void Main(string[] args)
{
string script =
  @"if object_id('dept', 'U') is not null
  drop table dept;
CREATE TABLE Dept(
  DEPTNO int PRIMARY KEY NOT NULL,
  DNAME varchar(14) NULL,
  LOC varchar(13) NULL
);"+
  "INSERT INTO DEPT VALUES (10,'ACCOUNTING','NEW YORK');"+
  "INSERT INTO DEPT VALUES (20,'RESEARCH','DALLAS');"+
  "INSERT INTO DEPT VALUES (30,'SALES','CHICAGO');"+
  "INSERT INTO DEPT VALUES (40,'OPERATIONS','BOSTON');"+
  "SELECT * FROM DEPT";
      SqlConnection myConn = new SqlConnection(
          "User Id=sa;Server=localhost;Initial Catalog=Test;");
      SqlScript myScript = new SqlScript(script,myConn);
      myScript.Progress += new Devart.Common.ScriptProgressEventHandler(OnProgress);
      myScript.Error += new Devart.Common.ScriptErrorEventHandler(OnError);
      myConn.Open();
      myScript.Execute();
      myConn.Close();
    }

static void OnProgress(object sender, Devart.Common.ScriptProgressEventArgs e)
{
  Console.WriteLine(e.Text);
  Console.WriteLine("  Successfully executed.");
}

static void OnError(object sender, Devart.Common.ScriptErrorEventArgs e)
{
  e.Ignore = true;
  Console.WriteLine(e.Text);
  Console.WriteLine("  Failed.");
}

Visual Basic

Module Module1

  Friend WithEvents myScript As Devart.Data.SqlServer.SqlScript

  Sub Main()
    Dim script As String = _
  "if object_id('dept', 'U') is not null" & _
  "  drop table dept;" & _
  "CREATE TABLE Dept(" & _
  "  DEPTNO int PRIMARY KEY NOT NULL," & _
  "  DNAME varchar(14) NULL," & _
  "  LOC varchar(13) NULL" & _
  ");" & _
  "INSERT INTO DEPT VALUES (10,'ACCOUNTING','NEW YORK');" & _
  "INSERT INTO DEPT VALUES (20,'RESEARCH','DALLAS');" & _
  "INSERT INTO DEPT VALUES (30,'SALES','CHICAGO');" & _
  "INSERT INTO DEPT VALUES (40,'OPERATIONS','BOSTON');" & _
  "SELECT * FROM DEPT"
    Dim myConn As SqlConnection = New SqlConnection( _
        "User Id=sa;Server=localhost;Initial Catalog=Test;")
    myScript = New SqlScript(script, myConn)
    myConn.Open()
    myScript.Execute()
    myConn.Close()
    Console.ReadLine()
  End Sub

  Sub OnProgress(ByVal sender As Object, ByVal e As Devart.Common.ScriptProgressEventArgs) Handles myScript.Progress
    Console.WriteLine(e.Text)
    Console.WriteLine("  Successfully executed.")
  End Sub

  Sub OnError(ByVal sender As Object, ByVal e As Devart.Common.ScriptErrorEventArgs) Handles myScript.Error
    e.Ignore = True
    Console.WriteLine(e.Text)
    Console.WriteLine("  Failed.")
  End Sub

End Module

Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.ComponentModel.Component
         Devart.Common.DbScript
            Devart.Data.SqlServer.SqlScript

Reference

DbScript Members
Devart.Common Namespace
SqlStatement Class
SqlStatementCollection Class

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