：winform的DataGridView中用C#实现按钮列置灰
DataGridView 控件包括 DataGridViewButtonCell 类，该类用于显示具有类似按钮的用户界面 (UI) 的单元格。但 DataGridViewButtonCell 不提供禁用由单元格显示的按钮外观的方式。
下面的代码示例演示如何自定义 DataGridViewButtonCell 类来显示可以显示为禁用的按钮。本示例定义一个新的单元格类型 DataGridViewDisableButtonCell，它由 DataGridViewButtonCell 派生。此单元格类型提供一个新的 Enabled 属性，可以将该属性设置为 false 来在单元格中绘制禁用的按钮。本示例还定义一个新的列类型 DataGridViewDisableButtonColumn，它显示 DataGridViewDisableButtonCell 对象。为了演示此新单元格类型和列类型，父 DataGridView 中的每个 DataGridViewCheckBoxCell 的当前值确定同一行中 DataGridViewDisableButtonCell 的 Enabled 属性是 true 还是 false。
首先要在代码中加入下面两个继承类：
public class DataGridViewDisableButtonColumn : DataGridViewButtonColumn
{
public DataGridViewDisableButtonColumn()
{
this.CellTemplate = new DataGridViewDisableButtonCell();
}
}
public class DataGridViewDisableButtonCell : DataGridViewButtonCell
{
private bool enabledValue;
public bool Enabled
{
get
{
return enabledValue;
}
set
{
enabledValue = value;
}
}
public override object Clone()
{
DataGridViewDisableButtonCell cell =
(DataGridViewDisableButtonCell)base.Clone();
cell.Enabled = this.Enabled;
return cell;
}
public DataGridViewDisableButtonCell()
{
this.enabledValue = true;
}
protected override void Paint(Graphics graphics,
Rectangle clipBounds, Rectangle cellBounds, int rowIndex,
DataGridViewElementStates elementState, object value,
object formattedValue, string errorText,
DataGridViewCellStyle cellStyle,
DataGridViewAdvancedBorderStyle advancedBorderStyle,
DataGridViewPaintParts paintParts)
{
if (!this.enabledValue)
{
if ((paintParts & DataGridViewPaintParts.Background) ==
DataGridViewPaintParts.Background)
{
SolidBrush cellBackground =
new SolidBrush(cellStyle.BackColor);
graphics.FillRectangle(cellBackground, cellBounds);
cellBackground.Dispose();
}
if ((paintParts & DataGridViewPaintParts.Border) ==
DataGridViewPaintParts.Border)
{
PaintBorder(graphics, clipBounds, cellBounds, cellStyle,
advancedBorderStyle);
}
Rectangle buttonArea = cellBounds;
Rectangle buttonAdjustment =
this.BorderWidths(advancedBorderStyle);
buttonArea.X += buttonAdjustment.X;
buttonArea.Y += buttonAdjustment.Y;
buttonArea.Height -= buttonAdjustment.Height;
buttonArea.Width -= buttonAdjustment.Width;
ButtonRenderer.DrawButton(graphics, buttonArea,
System.Windows.Forms.VisualStyles.PushButtonState.Disabled);
if (this.FormattedValue is String)
{
TextRenderer.DrawText(graphics,
(string)this.FormattedValue,
this.DataGridView.Font,
buttonArea, SystemColors.GrayText);
}
}
else
{
base.Paint(graphics, clipBounds, cellBounds, rowIndex,
elementState, value, formattedValue, errorText,
cellStyle, advancedBorderStyle, paintParts);
}
}
}
datagridview的button控件要在代码里面加入：
如加入编辑按钮：
DataGridViewDisableButtonColumn btn_ProEdit = new DataGridViewDisableButtonColumn();
btn_ProEdit.HeaderText = l.ALanuageBinding("gv_Action");
btn_ProEdit.Text = l.ALanuageBinding("gv_Edit");
btn_ProEdit.Name = "btn_ProEdit";
btn_ProEdit.Width = 50;
btn_ProEdit.UseColumnTextForButtonValue = true;
this.datagridview1.Columns.Add(btn_ProEdit);
禁用：
DataGridViewDisableButtonCell buttonCell = (DataGridViewDisableButtonCell)dgv_Promotiom.Rows[i].Cells["btn_ProEdit"];
buttonCell.Enabled = false;