禁用datagridview中的按钮列
我有一个数据网格视图有4列，前两列是combobox列，第三列是文本框列，第四列是按钮列。在表单加载我必须禁用数据网格的整个按钮列，然后我应该选择前三列和保存后，将这三个列保存在数据库中，特定行中的按钮列应该启用。应该通过单击按钮将第一列保存在数据库中。 请帮助我解决这个问题很多天这里是我使用的代码
private void SATAddTemplate_Load(object sender, EventArgs e) { foreach (DataGridViewRow row in datagrdADDTEMP.Rows) { DataGridViewButtonCell btn = (DataGridViewButtonCell)row.Cells[3]; btn.ReadOnly = true; } } private void btnSaveSettings_Click(object sender, EventArgs e) { foreach (DataGridViewRow row in datagrdADDTEMP.Rows) { DataGridViewButtonCell btn = (DataGridViewButtonCell)row.Cells[3]; btn.ReadOnly = false; } } 以下是设置DataGridViewButtonColumn中出现的按钮的Enabled属性的问题。
您需要扩展DataGridViewButtonColumn以使用可禁用按钮创建自己的DataGridView列。 这篇关于MSDN的文章详细介绍了如何做到这一点。
这篇文章有很多代码，我建议你仔细看看，但你真正需要做的就是将文章中的以下类复制并粘贴到你的项目中：
– DataGridViewDisableButtonColumn
– DataGridViewDisableButtonCell
完成此操作后，您将能够将DataGridViewDisableButtonColumn添加到DataGridView。 使用自定义列中公开的public Enabled属性设置每个单元格的Button控件的Enabled属性。 由于您要在列中设置所有按钮的Enabled属性，因此您可以编写一个辅助方法，循环遍历DataGridView中的所有行并设置Enabled属性：
private void SetDGVButtonColumnEnable(bool enabled) { foreach (DataGridViewRow row in dataGridView1.Rows) { // Set Enabled property of the fourth column in the DGV. ((DataGridViewDisableButtonCell)row.Cells[3]).Enabled = enabled; } dataGridView1.Refresh(); }
这是杰伊回答的补充。
根据请求，这是我用来创建可以禁用的按钮单元格的代码。 它包括双缓冲，以便在用户滚动时按钮不会闪烁。
/// /// Adapted from https://msdn.microsoft.com/en-us/library/ms171619.aspx. Double-buffering was added to remove flicker on re-paints. /// public class DataGridViewDisableButtonCell : DataGridViewButtonCell { private bool enabledValue; public bool Enabled { get { return enabledValue; } set { if (enabledValue == value) return; enabledValue = value; // force the cell to be re-painted if (DataGridView != null) DataGridView.InvalidateCell(this); } } // Override the Clone method so that the Enabled property is copied. public override object Clone() { var cell = (DataGridViewDisableButtonCell) base.Clone(); cell.Enabled = Enabled; return cell; } // By default, enable the button cell. public DataGridViewDisableButtonCell() { 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) { // The button cell is disabled, so paint the border, background, and disabled button for the cell. if (!enabledValue) { var currentContext = BufferedGraphicsManager.Current; using (var myBuffer = currentContext.Allocate(graphics, cellBounds)) { // Draw the cell background, if specified. if ((paintParts & DataGridViewPaintParts.Background) == DataGridViewPaintParts.Background) { using (var cellBackground = new SolidBrush(cellStyle.BackColor)) { myBuffer.Graphics.FillRectangle(cellBackground, cellBounds); } } // Draw the cell borders, if specified. if ((paintParts & DataGridViewPaintParts.Border) == DataGridViewPaintParts.Border) { PaintBorder(myBuffer.Graphics, clipBounds, cellBounds, cellStyle, advancedBorderStyle); } // Calculate the area in which to draw the button. var buttonArea = cellBounds; var buttonAdjustment = BorderWidths(advancedBorderStyle); buttonArea.X += buttonAdjustment.X; buttonArea.Y += buttonAdjustment.Y; buttonArea.Height -= buttonAdjustment.Height; buttonArea.Width -= buttonAdjustment.Width; // Draw the disabled button. ButtonRenderer.DrawButton(myBuffer.Graphics, buttonArea, PushButtonState.Disabled); // Draw the disabled button text. var formattedValueString = FormattedValue as string; if (formattedValueString != null) { TextRenderer.DrawText(myBuffer.Graphics, formattedValueString, DataGridView.Font, buttonArea, SystemColors.GrayText, TextFormatFlags.PreserveGraphicsTranslateTransform | TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter); } myBuffer.Render(); } } else { // The button cell is enabled, so let the base class handle the painting. base.Paint(graphics, clipBounds, cellBounds, rowIndex, elementState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts); } } }
你可以使用这篇MSDN文章MSDN文章：在dataGridView中禁用按钮，它使用datagridview类的按钮，并注意你必须在你愿意处理它时检查按钮的启用状态