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Viewing Errors within a DataSet with the Windows Forms ErrorProvider Component

Visual Studio .NET 2003

You can use the Windows Forms ErrorProvider component to view column errors within a dataset or other data source. For an ErrorProvider component to display data errors on a form, it does not have to be directly associated with a control. Once it is bound to a data source, it can display an error icon next to any control that is bound to the same data source.

Note   If you change the error provider's DataSource and DataMember properties at run time, you should use the BindToDataAndErrors method to avoid conflicts. For more information, see ErrorProvider.BindToDataAndErrors Method.

To display data errors

  1. Bind the component to a specific column within a data table.
    ' Visual Basic
    ' Assumes existence of DataSet1, DataTable1
    TextBox1.DataBindings.Add("Text", DataSet1, "Customers.Name")
    ErrorProvider1.DataSource = DataSet1
    ErrorProvider1.DataMember = "Customers"
    // C#
    // Assumes existence of DataSet1, DataTable1
    textBox1.DataBindings.Add("Text", DataSet1, "Customers.Name");
    errorProvider1.DataSource = DataSet1;
    errorProvider1.DataMember = "Customers";
  2. Set the ContainerControl property to the form.
    ' Visual Basic
    ErrorProvider1.ContainerControl = Me
    // C#
    errorProvider1.ContainerControl = this;
  3. Set the position of the current record to a row that contains a column error.
    ' Visual Basic
    DataTable1.Rows(5).SetColumnError("Name", "Bad data in this row.")
    Me.BindingContext(DataTable1).Position = 5
    // C#
    DataTable1.Rows[5].SetColumnError("Name", "Bad data in this row.");
    this.BindingContext [DataTable1].Position = 5;

See Also

Introduction to the Windows Forms ErrorProvider Component | Displaying Error Icons for Form Validation with the Windows Forms ErrorProvider Component

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