MySqlDataTable Class

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Represents a single object that provides all of the functionality needed to retrieve and manipulate data from a MySQL data source.

Syntax

Visual Basic
C#


'Declaration Public Class MySqlDataTable Inherits Devart.Common.DbDataTable Implements System.ComponentModel.IComponent, System.ComponentModel.IListSource, System.ComponentModel.ISupportInitialize, System.ComponentModel.ISupportInitializeNotification, System.IDisposable, System.IServiceProvider, System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable

'Declaration
 
Public Class MySqlDataTable 
   Inherits Devart.Common.DbDataTable
   Implements System.ComponentModel.IComponent, System.ComponentModel.IListSource, System.ComponentModel.ISupportInitialize, System.ComponentModel.ISupportInitializeNotification, System.IDisposable, System.IServiceProvider, System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable


public class MySqlDataTable : Devart.Common.DbDataTable, System.ComponentModel.IComponent, System.ComponentModel.IListSource, System.ComponentModel.ISupportInitialize, System.ComponentModel.ISupportInitializeNotification, System.IDisposable, System.IServiceProvider, System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable

public class MySqlDataTable : Devart.Common.DbDataTable, System.ComponentModel.IComponent, System.ComponentModel.IListSource, System.ComponentModel.ISupportInitialize, System.ComponentModel.ISupportInitializeNotification, System.IDisposable, System.IServiceProvider, System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable

Remarks

The MySqlDataTable class extends the Devart.Common.DbDataTable class to provide a single object that can be used to access and update data from a data source. Actually, MySqlDataTable replaces MySqlConnection, MySqlCommand, MySqlDataAdapter, and MySqlCommandBuilder classes with all-in-one class. When a MySqlDataTable object is created, the default values of its constituent parts are set to reasonable defaults, meaning that the programmer can create a single object and immediately use it to retrieve and manipulate data from a data source.

By using MySqlDataTable you can avoid explicit creation of MySqlConnection and MySqlCommand objects. When appropriate form of constructor is used, these objects are created automatically when you retrieve data from a data source. It allows you to cut down the size of the written code.

MySqlDataTable allows you to automate loading of subsets of data either by selecting Devart.Common.DbTable.StartRecord and MaxRecords properties or by using Fill or FillPage methods that support passing parameter values into the query text.

The MySqlDataTable class is designed to employ both connected and disconnected data access models. It also provides functionality for asynchronous fill operations.

The MySqlDataTable class can be fully adjusted at design-time. You may retrieve data at design-time from a data source by setting Devart.Common.DbTable.Active property to true.

For more information on advanced features of MySqlDataTable please refer to topic MySqlDataTable Advanced Features.

This class supports cross-form data binding with the InterForm Technology.

Note: This class is not available in .NET Standard 1.3 compatible assembly. It is available only in the assembly for full .NET Framework and .NET Standard 2.0 compatible assemblies.

This class is available only in Professional and Developer Editions. It is not available in Standard and Mobile Editions.

Example

This sample shows easiness of use of MySqlDataTable. The sample creates a MySqlDataTable object, passing it SQL query text and connection string, retrieves data from a table and modifies it. Content of the table is printed to console then. Notice that no other component needs to be created by programmer.

csharp


public void UseDataTable() { MySqlDataTable myDataTable = new MySqlDataTable("SELECT * FROM Test.Dept", "User Id=root;Host=localhost;Database=Test;"); try { myDataTable.FetchAll = true; myDataTable.Active = true; myDataTable.Rows[3]["DName"] = "Researches"; Console.WriteLine(myDataTable.Update()+" rows updated."); foreach(DataRow myRow in myDataTable.Rows) { foreach(DataColumn myCol in myDataTable.Columns) { Console.Write(myRow[myCol]+"\t"); } Console.WriteLine(); } } finally { myDataTable.Active = false; } }

public void UseDataTable()
{
  MySqlDataTable myDataTable = new MySqlDataTable("SELECT * FROM Test.Dept", 
      "User Id=root;Host=localhost;Database=Test;");
  try
  {
    myDataTable.FetchAll = true;
        myDataTable.Active = true;
    myDataTable.Rows[3]["DName"] = "Researches";
    Console.WriteLine(myDataTable.Update()+" rows updated.");
    foreach(DataRow myRow in myDataTable.Rows)
    {
      foreach(DataColumn myCol in myDataTable.Columns)
      {
        Console.Write(myRow[myCol]+"\t");
      }
      Console.WriteLine();
    }
  }
  finally
  {
    myDataTable.Active = false;
  }
}

Visual Basic


Public Sub UseDataTable() Dim myDataTable As MySqlDataTable = New MySqlDataTable("SELECT * FROM Test.Dept", _ "User Id=root;Host=localhost;Database=Test;") Try myDataTable.FetchAll = True myDataTable.Active = True myDataTable.Rows(3)("DName") = "Researches" Console.WriteLine(myDataTable.Update() & " rows updated.") Dim myRow As DataRow Dim myCol As DataColumn For Each myRow In myDataTable.Rows For Each myCol In myDataTable.Columns Console.Write(myRow(myCol) & Chr(9)) Next myCol Console.WriteLine() Next myRow Finally myDataTable.Active = False End Try End Sub

Public Sub UseDataTable()
  Dim myDataTable As MySqlDataTable = New MySqlDataTable("SELECT * FROM Test.Dept", _
      "User Id=root;Host=localhost;Database=Test;")
  Try
    myDataTable.FetchAll = True
        myDataTable.Active = True
    myDataTable.Rows(3)("DName") = "Researches"
    Console.WriteLine(myDataTable.Update() & " rows updated.")
    Dim myRow As DataRow
    Dim myCol As DataColumn
    For Each myRow In myDataTable.Rows
      For Each myCol In myDataTable.Columns
        Console.Write(myRow(myCol) & Chr(9))
      Next myCol
      Console.WriteLine()
    Next myRow
  Finally
    myDataTable.Active = False
  End Try
End Sub

Inheritance Hierarchy

System.Object
   System.ComponentModel.MarshalByValueComponent
      System.Data.DataTable
         Devart.Common.DbDataTable
            Devart.Data.MySql.MySqlDataTable

Reference

MySqlDataTable Members
Devart.Data.MySql Namespace
MySqlConnection Class
MySqlDataReader Class

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