DataGridView.AllowUserToAddRows Eigenschaft

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Ruft einen Wert ab, der angibt, ob die Option zum Hinzufügen von Zeilen angezeigt wird, oder legt diesen Wert fest.

public:
 property bool AllowUserToAddRows { bool get(); void set(bool value); };

public bool AllowUserToAddRows { get; set; }

member this.AllowUserToAddRows : bool with get, set

Public Property AllowUserToAddRows As Boolean

Eigenschaftswert

Boolean

true, wenn die Option zum Hinzufügen von Zeilen angezeigt wird, andernfalls false. Der Standardwert ist true.

Beispiele

Im folgenden Codebeispiel wird die Verwendung dieser Eigenschaft in einem DataGridView Steuerelement veranschaulicht, das hauptsächlich für die Anzeige vorgesehen ist. In diesem Beispiel wird die visuelle Darstellung des Steuerelements auf verschiedene Arten angepasst, und das Steuerelement wird für eingeschränkte Interaktivität konfiguriert. Dieses Beispiel ist Teil eines größeren Beispiels, das in der DataGridViewCellStyle Klassenübersicht verfügbar ist.

// Configures the appearance and behavior of a DataGridView control.
private void InitializeDataGridView()
{
    // Initialize basic DataGridView properties.
    dataGridView1.Dock = DockStyle.Fill;
    dataGridView1.BackgroundColor = Color.LightGray;
    dataGridView1.BorderStyle = BorderStyle.Fixed3D;

    // Set property values appropriate for read-only display and 
    // limited interactivity. 
    dataGridView1.AllowUserToAddRows = false;
    dataGridView1.AllowUserToDeleteRows = false;
    dataGridView1.AllowUserToOrderColumns = true;
    dataGridView1.ReadOnly = true;
    dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
    dataGridView1.MultiSelect = false;
    dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.None;
    dataGridView1.AllowUserToResizeColumns = false;
    dataGridView1.ColumnHeadersHeightSizeMode = 
        DataGridViewColumnHeadersHeightSizeMode.DisableResizing;
    dataGridView1.AllowUserToResizeRows = false;
    dataGridView1.RowHeadersWidthSizeMode = 
        DataGridViewRowHeadersWidthSizeMode.DisableResizing;

    // Set the selection background color for all the cells.
    dataGridView1.DefaultCellStyle.SelectionBackColor = Color.White;
    dataGridView1.DefaultCellStyle.SelectionForeColor = Color.Black;

    // Set RowHeadersDefaultCellStyle.SelectionBackColor so that its default
    // value won't override DataGridView.DefaultCellStyle.SelectionBackColor.
    dataGridView1.RowHeadersDefaultCellStyle.SelectionBackColor = Color.Empty;

    // Set the background color for all rows and for alternating rows. 
    // The value for alternating rows overrides the value for all rows. 
    dataGridView1.RowsDefaultCellStyle.BackColor = Color.LightGray;
    dataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.DarkGray;

    // Set the row and column header styles.
    dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
    dataGridView1.ColumnHeadersDefaultCellStyle.BackColor = Color.Black;
    dataGridView1.RowHeadersDefaultCellStyle.BackColor = Color.Black;

    // Set the Format property on the "Last Prepared" column to cause
    // the DateTime to be formatted as "Month, Year".
    dataGridView1.Columns["Last Prepared"].DefaultCellStyle.Format = "y";

    // Specify a larger font for the "Ratings" column. 
    using (Font font = new Font(
        dataGridView1.DefaultCellStyle.Font.FontFamily, 25, FontStyle.Bold))
    {
        dataGridView1.Columns["Rating"].DefaultCellStyle.Font = font;
    }

    // Attach a handler to the CellFormatting event.
    dataGridView1.CellFormatting += new
        DataGridViewCellFormattingEventHandler(dataGridView1_CellFormatting);
}

' Configures the appearance and behavior of a DataGridView control.
Private Sub InitializeDataGridView()

    ' Initialize basic DataGridView properties.
    dataGridView1.Dock = DockStyle.Fill
    dataGridView1.BackgroundColor = Color.LightGray
    dataGridView1.BorderStyle = BorderStyle.Fixed3D

    ' Set property values appropriate for read-only display and 
    ' limited interactivity. 
    dataGridView1.AllowUserToAddRows = False
    dataGridView1.AllowUserToDeleteRows = False
    dataGridView1.AllowUserToOrderColumns = True
    dataGridView1.ReadOnly = True
    dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect
    dataGridView1.MultiSelect = False
    dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.None
    dataGridView1.AllowUserToResizeColumns = False
    dataGridView1.ColumnHeadersHeightSizeMode = _
        DataGridViewColumnHeadersHeightSizeMode.DisableResizing
    dataGridView1.AllowUserToResizeRows = False
    dataGridView1.RowHeadersWidthSizeMode = _
        DataGridViewRowHeadersWidthSizeMode.DisableResizing

    ' Set the selection background color for all the cells.
    dataGridView1.DefaultCellStyle.SelectionBackColor = Color.White
    dataGridView1.DefaultCellStyle.SelectionForeColor = Color.Black

    ' Set RowHeadersDefaultCellStyle.SelectionBackColor so that its default
    ' value won't override DataGridView.DefaultCellStyle.SelectionBackColor.
    dataGridView1.RowHeadersDefaultCellStyle.SelectionBackColor = Color.Empty

    ' Set the background color for all rows and for alternating rows. 
    ' The value for alternating rows overrides the value for all rows. 
    dataGridView1.RowsDefaultCellStyle.BackColor = Color.LightGray
    dataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.DarkGray

    ' Set the row and column header styles.
    dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor = Color.White
    dataGridView1.ColumnHeadersDefaultCellStyle.BackColor = Color.Black
    dataGridView1.RowHeadersDefaultCellStyle.BackColor = Color.Black

    ' Set the Format property on the "Last Prepared" column to cause
    ' the DateTime to be formatted as "Month, Year".
    dataGridView1.Columns("Last Prepared").DefaultCellStyle.Format = "y"

    ' Specify a larger font for the "Ratings" column. 
    Dim font As New Font( _
        dataGridView1.DefaultCellStyle.Font.FontFamily, 25, FontStyle.Bold)
    Try
        dataGridView1.Columns("Rating").DefaultCellStyle.Font = font
    Finally
        font.Dispose()
    End Try

End Sub

Hinweise

Wenn an DataGridView Daten gebunden ist, darf der Benutzer Zeilen hinzufügen, wenn sowohl diese Eigenschaft als auch die Eigenschaft der Datenquelle IBindingList.AllowNew auf truefestgelegt sind.

Weitere Informationen

• DataGridView-Steuerelement (Windows Forms)