禁用或使DataGridView变灰

本文关键字：DataGridView 变灰 | 更新日期: 2023-09-27 18:19:15

是否有任何简单的方法来禁用/灰色的DataGridView?例如，当

dgv.Enabled = false

dgv的外观没有变化。我看到有人附加了以下内容:

dgv.forecolor = gray
dgv.columnheader.forecolor = gray

然而，这看起来很笨拙。有没有更好的办法?

禁用或使DataGridView变灰

Private Sub DataGridView1_EnabledChanged(sender As Object, e As EventArgs) Handles DataGridView1.EnabledChanged
    If Not DataGridView1.Enabled Then
        DataGridView1.DefaultCellStyle.BackColor = SystemColors.Control
        DataGridView1.DefaultCellStyle.ForeColor = SystemColors.GrayText
        DataGridView1.ColumnHeadersDefaultCellStyle.BackColor = SystemColors.Control
        DataGridView1.ColumnHeadersDefaultCellStyle.ForeColor = SystemColors.GrayText
        DataGridView1.CurrentCell = Nothing
        DataGridView1.ReadOnly = True
        DataGridView1.EnableHeadersVisualStyles = False
    Else
        DataGridView1.DefaultCellStyle.BackColor = SystemColors.Window
        DataGridView1.DefaultCellStyle.ForeColor = SystemColors.ControlText
        DataGridView1.ColumnHeadersDefaultCellStyle.BackColor = SystemColors.Window
        DataGridView1.ColumnHeadersDefaultCellStyle.ForeColor = SystemColors.ControlText
        DataGridView1.ReadOnly = False
        DataGridView1.EnableHeadersVisualStyles = True
    End If
End Sub

对你的问题的简单回答:不，没有更好的办法。

MSDN对这个话题保持沉默，但论坛上议论纷纷。手动将背景色设置为灰色是大多数人在DGV上"残疾"的原因。

sveileux2的示例，仅在c#(这是标签)和高级(允许您将其放在任意名称和任意数量的DataGridViews上)

private void DataGridView_EnabledChanged(object sender, EventArgs e)
    {
        DataGridView dgv = sender as DataGridView;
        if (!dgv.Enabled) {
            dgv.DefaultCellStyle.BackColor = SystemColors.Control;
            dgv.DefaultCellStyle.ForeColor = SystemColors.GrayText;
            dgv.ColumnHeadersDefaultCellStyle.BackColor = SystemColors.Control;
            dgv.ColumnHeadersDefaultCellStyle.ForeColor = SystemColors.GrayText;
            dgv.CurrentCell = null;
            dgv.ReadOnly = true;
            dgv.EnableHeadersVisualStyles = false;
        }
        else {
            dgv.DefaultCellStyle.BackColor = SystemColors.Window;
            dgv.DefaultCellStyle.ForeColor = SystemColors.ControlText;
            dgv.ColumnHeadersDefaultCellStyle.BackColor = SystemColors.Window;
            dgv.ColumnHeadersDefaultCellStyle.ForeColor = SystemColors.ControlText;
            dgv.ReadOnly = false;
            dgv.EnableHeadersVisualStyles = true;
        }
    }

我将在这里添加这个，即使这个问题有点老了-我通过重写控件上的Paint方法来绘制透明框，这与其他方法不同。我使用了一个从基本DataGridView继承的类，然后为OnPaint方法提供了一些额外的属性和覆盖。您也可以在Paint事件中这样做，但对我来说，我已经制作了我们自己的控件版本。

这样做的好处是不会改变您已经设置的任何行/单元格颜色/格式，只是想在控件被禁用时使其变暗。

简单地设置DisableColor(例如黑色)使其变暗(你也可以用DisableColorAlpha属性改变alpha通道)。否则，它会像往常一样运行。

/// <summary>
/// Color used when the grid is disabled
/// </summary>
[Category("Appearance"), DefaultValue(typeof(Color), "Transparent"), Description("Color to use when the control is disabled (should be transparent)")]
public Color DisableColor { get; set; }
/// <summary>
/// Color used when the grid is disabled
/// </summary>
[Category("Appearance"), DefaultValue(50), Description("Alpha channel value for disabled color (0-255)")]
public int DisableColorAlpha { get; set; }
protected override void OnPaint(PaintEventArgs e)
{
    base.OnPaint(e);
    if (this.Enabled == false && DisableColor != Color.Transparent)
    {
        // paint a transparent box -- simulate disable
        using (Brush b = new SolidBrush(Color.FromArgb(DisableColorAlpha, DisableColor)))
        {
            e.Graphics.FillRectangle(b, e.ClipRectangle);
        }
    }
}

设置标题颜色为灰色不会改变它。你还需要将EnableHeadersVisualStyles设置为false。

dgv.ForeColor = Color.Gray;
dgv.ColumnHeadersDefaultCellStyle.ForeColor = Color.Gray;
dgv.EnableHeadersVisualStyles = false;

我知道这是一个已经解决的问题，但我想防止为其他人损失1小时。

//C# version for buttons also. Inspired by sveilleux2.
private void DataGridView1_EnabledChanged(object sender, EventArgs e){
if (!DataGridView1.Enabled){
    DataGridView1.DefaultCellStyle.BackColor = SystemColors.Control;
    DataGridView1.DefaultCellStyle.ForeColor = SystemColors.GrayText;
    DataGridView1.ColumnHeadersDefaultCellStyle.BackColor = SystemColors.Control;
    DataGridView1.ColumnHeadersDefaultCellStyle.ForeColor = SystemColors.GrayText;
    //Disable two colums of buttons
    for (int i = 0; i < DataGridView1.RowCount; i++){
        DataGridViewButtonCell buttonCell = (DataGridViewButtonCell)DataGridView1.Rows[i].Cells[1];
        buttonCell.FlatStyle = FlatStyle.Popup;
        buttonCell.Style.ForeColor = SystemColors.GrayText;
        buttonCell.Style.BackColor = SystemColors.Control;
        DataGridViewButtonCell buttonCell_2 = (DataGridViewButtonCell)DataGridView1.Rows[i].Cells[6];
        buttonCell_2.FlatStyle = FlatStyle.Popup;
        buttonCell_2.Style.ForeColor = SystemColors.GrayText;
        buttonCell_2.Style.BackColor = SystemColors.Control;
    }
    DataGridView1.Columns[1].DefaultCellStyle.ForeColor = SystemColors.GrayText;
    DataGridView1.Columns[1].DefaultCellStyle.BackColor = SystemColors.Control;
    DataGridView1.ReadOnly = true;
    DataGridView1.EnableHeadersVisualStyles = false;
    DataGridView1.CurrentCell = null;
}else{
    DataGridView1.DefaultCellStyle.BackColor = SystemColors.Window;
    DataGridView1.DefaultCellStyle.ForeColor = SystemColors.ControlText;
    DataGridView1.ColumnHeadersDefaultCellStyle.BackColor = SystemColors.Window;
    DataGridView1.ColumnHeadersDefaultCellStyle.ForeColor = SystemColors.ControlText;
    DataGridView1.ReadOnly = false;
    DataGridView1.EnableHeadersVisualStyles = false;
    //Enable two colums of buttons
    for (int i = 0; i < DataGridView1.RowCount; i++){
        DataGridViewButtonCell buttonCell = (DataGridViewButtonCell)DataGridView1.Rows[i].Cells[1];
        buttonCell.FlatStyle = FlatStyle.Standard;
        DataGridViewButtonCell buttonCell_2 = (DataGridViewButtonCell)DataGridView1.Rows[i].Cells[6];
        buttonCell_2.FlatStyle = FlatStyle.Standard;
    }
}

}

我假设您希望datagridview向用户显示信息，并拒绝用户以任何方式修改的能力。

private void IntializeDataGridView()
  {
    dataGridViewTest.ReadOnly = true;
   // you can code permissions or colors as well
    dataGridViewTest.AllowUserToAddRows = false;
    dataGridViewTest.AllowUserToDeleteRows = false;
    dataGridViewTest.AllowUserToOrderColumns = false;
    dataGridViewTest.BackgroundColor = Color.LightGray;
   //so on and so forth
  }

希望这对你有帮助。:]

设置ReadOnly = false会改变外观吗?我认为可能是灰色的"可点击"部分的数据，如列标题..但你仍然可以看到其中的数据

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