Question

我有一个数据网格视图有4列，前两列是组合框列，第三列是文本框列，第四列是按钮列。在表单加载时我必须禁用数据网格的整个按钮列，之后我应该先选择三列并保存这些前三列保存后，特定行中的按钮列应该启用。前三列应该通过单击按钮保存在数据库中。请帮助我多天来解决这个问题这是我用过的代码

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;
           }
     }

Answer 1

以下是设置Enabled中显示的按钮的DataGridViewButtonColumn属性问题的一些帮助。

您需要扩展DataGridViewButtonColumn以使用禁用按钮创建自己的DataGridView列。 This article on MSDN详细说明了如何执行此操作。

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，您就可以将DataGridViewDisableButtonColumn添加到DataGridView中。使用自定义列中公开的公共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循环方法，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();
}

Answer 2

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。

/// <summary>
/// Adapted from https://msdn.microsoft.com/en-us/library/ms171619.aspx. Double-buffering was added to remove flicker on re-paints.
/// </summary>
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);
        }
    }
}

Answer 3

您可以使用此MSDN文章MSDN article:Disable button in dataGridView它使用datagridview类的按钮，并注意您必须在需要时检查按钮的启用状态

禁用datagridview中的按钮列

3 个答案: