MySqlLoaderColumn Class

In This Topic

Syntax
Remarks
Example
Inheritance Hierarchy
Requirements
See Also

Represents the attributes for column loading.

Syntax

Visual Basic
C#

public class MySqlLoaderColumn : Devart.Common.DbLoaderColumn

'Declaration
 
Public Class MySqlLoaderColumn 
   Inherits Devart.Common.DbLoaderColumn

Remarks

Each MySqlLoader uses a Columns to maintain a collection of MySqlLoaderColumn objects. The MySqlLoaderColumn object represents the attributes for column loading. Every MySqlLoaderColumn object corresponds to one of the table fields with the same name as its Name property.

You can manually make changes to the Columns collection to exclude some columns from INSERT statement generated by MySqlLoader object.

Note: This class is available with dotConnect for MySQL Professional edition only.

Example

This sample shows how to perform loading of data into a table with the last column set to default value.

csharp

public void LoadData(MySqlConnection myConnection)
{
  myConnection.Open();
  myConnection.Database = "Test";
  MySqlLoader loader = new MySqlLoader();
  loader.Connection = myConnection;
  loader.TableName = "load_table";
  try
  {
    loader.CreateColumns();
    //Do not insert data in the last column
    loader.Columns.RemoveAt(loader.Columns.Count-1);
    loader.Open();
    for (int i = 1; i <= 100; i++)
    {
      loader.SetValue("id", i);
      loader.SetValue(1, "test string");
      loader.SetValue("date_field", DateTime.Now);
      loader.NextRow();
    }
    loader.Close();
  }
  finally
  {
    myConnection.Close();
  }
}

Visual Basic

Public Sub LoadData(ByVal myConnection As MySqlConnection)
  myConnection.Open()
  myConnection.Database = "Test"
  Dim loader As MySqlLoader
  loader = New MySqlLoader
  loader.Connection = myConnection
  loader.TableName = "load_table"
  Try
    loader.CreateColumns()
    ' Do not insert data in the last column
    loader.Columns.RemoveAt(loader.Columns.Count - 1)
    loader.Open()
    Dim i As Integer
    For i = 1 To 100
      loader.SetValue("id", i)
      loader.SetValue(1, "test string")
      loader.SetValue("date_field", DateTime.Now)
      loader.NextRow()
    Next i
    loader.Close()
  Finally
    myConnection.Close()
  End Try
End Sub

Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      Devart.Common.DbLoaderColumn
         Devart.Data.MySql.MySqlLoaderColumn

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

MySqlLoaderColumn Members
Devart.Data.MySql Namespace

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