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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)

'Declaration
Public Property DataMember As String
'Usage
Dim instance As ErrorProvider 
Dim value As String 

value = instance.DataMember

instance.DataMember = value

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 Sub 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 = Me
    errorProvider1.BlinkRate = 200
End Sub 'InitializeComponent
 '... 
' Since the ErrorProvider control does not have a visible component, 
' it does not need to be added to the form.  

Private Sub buttonSave_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    ' Checks for a bad post code. 
    Dim CustomersTable As DataTable
    CustomersTable = dataSet1.Tables("Customers")
    Dim row As DataRow
    For Each row In CustomersTable.Rows
        If Convert.ToBoolean(row("PostalCodeIsNull")) Then
            row.RowError = "The Customer details contain errors"
            row.SetColumnError("PostalCode", "Postal Code required")
        End If 
    Next row
End Sub 'buttonSave_Click

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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