DataMember Property

ErrorProvider.DataMember Property


Gets or sets the list within a data source to monitor.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public string DataMember { get; set; }

Property Value

Type: System.String

The string that represents a list within the data source specified by the DataSource to be monitored. Typically, this will be a DataTable.

The DataMember is a navigation string based on DataSource.

To avoid conflicts at run time that can occur when changing DataSource and DataMember, you should use BindToDataAndErrors instead of setting DataSource and DataMember individually.

The following code example shows how to use the ErrorProvider with a DataSource and DataMember to indicate a data error to the user.

private void InitializeComponent()
     // Standard control setup.
     // You set the DataSource to a data set, and the DataMember to a table.
     errorProvider1.DataSource = dataSet1 ;
     errorProvider1.DataMember = dataTable1.TableName ;
     errorProvider1.ContainerControl = this ;
     errorProvider1.BlinkRate = 200 ;
     // Since the ErrorProvider control does not have a visible component,
     // it does not need to be added to the form. 

 private void buttonSave_Click(object sender, System.EventArgs e)
     // Checks for a bad post code.
     DataTable CustomersTable;
     CustomersTable = dataSet1.Tables["Customers"];
     foreach (DataRow row in (CustomersTable.Rows)) 
         if (Convert.ToBoolean(row["PostalCodeIsNull"])) 
             row.RowError="The Customer details contain errors";
             row.SetColumnError("PostalCode", "Postal Code required");

.NET Framework
Available since 1.1
Return to top
© 2015 Microsoft