Ado. NET Bulk Update operation

Source: Internet
Author: User

Bulk Update operations

. In the previous version of Ado.net, the Sqldataadapterde Update method will invoke an update operation for each row in the dataset

. In ado.net2.0, you can set the UpdateBatchSize property to perform multiple updates in one step

. In this way, you can improve the efficiency of data update

. The default value of Updatabatchsize is 1, which makes the default update behavior consistent with previous versions of Ado.net.

Code Experience

Public Form1 ()

{

conn = new SqlConnection (configurationmanager.connectionstrings["awconnectionstring"). ConnectionString);

Dadapt = new SqlDataAdapter ("Select ProductID, Name, ListPrice from Production.Product", conn);

InitializeComponent ();

}

SqlConnection Conn;

SqlDataAdapter dadapt;

DataSet DSet = new DataSet ();

StringBuilder logstring = new StringBuilder ("");

private void Batchupdateform_load (System.Object sender, System.EventArgs e)

{

Dadapt.rowupdating + = new System.Data.SqlClient.SqlRowUpdatingEventHandler (onrowupdating);

dadapt.rowupdated + = new System.Data.SqlClient.SqlRowUpdatedEventHandler (onrowupdated);

}

private void Getdatabutton_click (System.Object sender, System.EventArgs e)

{

Dadapt.fill (DSet, "Product");

Productgrid.datasource = dset.tables["Product"];

}

private void Updatedatabutton_click (System.Object sender, System.EventArgs e)

{

SqlCommandBuilder cb = new SqlCommandBuilder (DADAPT);

Logstring.remove (0, logstring.length);

Enable batching by setting batch size!= 1.

dadapt.updatebatchsize = Int. Parse (Batchsizetextbox.text);

Execute the update.

Dadapt.update (dset.tables["Product");

MessageBox.Show (Logstring.tostring ());

}

Handler for the RowUpdating event

public void Onrowupdating (object sender, Sqlrowupdatingeventargs e)

{

Logstring.appendline ("Starting row update");

}

Handler for RowUpdated event

public void onrowupdated (object sender, Sqlrowupdatedeventargs e)

{

Logstring.appendline ("Completed row Update");

}

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