DataGridView CheckBox事件

Question

我正在制作一个DataGridView带有一系列Checkboxes的水平和垂直相同的标签.任何相同的标签,复选框都将处于非活动状态,并且我只希望每个组合的两个"检查"之一有效.以下屏幕截图显示了我的内容: DataGridView http://i46.tinypic.com/2e4m3pz.png

在下半部分检查的任何东西,我想要在鞋帮上进行UN检查.因此,如果检查[quux,spam](或[7,8]为基于零的坐标),我想要[垃圾邮件,quux]([8,7])未经检查.到目前为止我所拥有的是以下内容:

    dgvSysGrid.RowHeadersWidthSizeMode = DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders;
    dgvSysGrid.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
    string[] allsysNames = { "heya", "there", "lots", "of", "names", "foo", "bar", "quux", "spam", "eggs", "bacon" };

    // Add a column for each entry, and a row for each entry, and mark the "diagonals" as readonly
    for (int i = 0; i < allsysNames.Length; i++)
    {
        dgvSysGrid.Columns.Add(new DataGridViewCheckBoxColumn(false));
        dgvSysGrid.Columns[i].HeaderText = allsysNames[i];
        dgvSysGrid.Rows.Add();
        dgvSysGrid.Rows[i].HeaderCell.Value = allsysNames[i];
        // Mark all of the "diagonals" as unable to change
        DataGridViewCell curDiagonal = dgvSysGrid[i, i];
        curDiagonal.ReadOnly = true;
        curDiagonal.Style.BackColor = Color.Black;
        curDiagonal.Style.ForeColor = Color.Black;
    }

    // Hook up the event handler so that we can change the "corresponding" checkboxes as needed
    //dgvSysGrid.CurrentCellDirtyStateChanged += new EventHandler(dgvSysGrid_CurrentCellDirtyStateChanged);
    dgvSysGrid.CellValueChanged += new DataGridViewCellEventHandler(dgvSysGrid_CellValueChanged);

}

void dgvSysGrid_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
    Point cur = new Point(e.ColumnIndex, e.RowIndex);

    // Change the diagonal checkbox to the opposite state
    DataGridViewCheckBoxCell curCell = (DataGridViewCheckBoxCell)dgvSysGrid[cur.X, cur.Y];
    DataGridViewCheckBoxCell diagCell = (DataGridViewCheckBoxCell)dgvSysGrid[cur.Y, cur.X];
    if ((bool)(curCell.Value) == true)
    {
        diagCell.Value = false;
    }
    else
    {
        diagCell.Value = true;
    }
}

/// <summary>
/// Change the corresponding checkbox to the opposite state of the current one
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void dgvSysGrid_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
    Point cur = dgvSysGrid.CurrentCellAddress;

    // Change the diagonal checkbox to the opposite state
    DataGridViewCheckBoxCell curCell = (DataGridViewCheckBoxCell)dgvSysGrid[cur.X, cur.Y];
    DataGridViewCheckBoxCell diagCell = (DataGridViewCheckBoxCell)dgvSysGrid[cur.Y, cur.X];
    if ((bool)(curCell.Value) == true)
    {
        diagCell.Value = false;
    }
    else
    {
        diagCell.Value = true;
    }
} 

问题是,如果我使用CellValueChanged事件,那么单元格值的变化似乎总是"落后"你实际点击的地方,如果我处于"脏"状态,我不知道如何获取当前单元格curCell以null形式出现(暗示当前的单元格地址在某种程度上是错误的,但我没有尝试将该值取出)意味着路径根本不起作用.

基本上,如何使用正确的布尔值获取"正确"的地址,以便我的翻转算法可以工作？

Answer 1

最终,正是这样做的CurrentCellDirtyStateChanged事件,但你需要以正确的方式做到这一点.正确的方式是MSDN,虽然乍一看没有意义.

上面的一个片段,我最终做的是下面的内容:

    // Hook up the event handler so that we can change the "corresponding" checkboxes as needed
    dgvSysGrid.CurrentCellDirtyStateChanged += new EventHandler(dgvSysGrid_CurrentCellDirtyStateChanged);
    dgvSysGrid.CellValueChanged += new DataGridViewCellEventHandler(dgvSysGrid_CellValueChanged);

}

void dgvSysGrid_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
    Point cur = new Point(e.ColumnIndex, e.RowIndex);

    // Change the diagonal checkbox to the opposite state
    DataGridViewCheckBoxCell curCell = (DataGridViewCheckBoxCell)dgvSysGrid[cur.X, cur.Y];
    DataGridViewCheckBoxCell diagCell = (DataGridViewCheckBoxCell)dgvSysGrid[cur.Y, cur.X];
    if ((bool)(curCell.Value) == true)
    {
        diagCell.Value = false;
    }
    else
    {
        diagCell.Value = true;
    }
}

void dgvSysGrid_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
    if (dgvSysGrid.IsCurrentCellDirty)
    {
        dgvSysGrid.CommitEdit(DataGridViewDataErrorContexts.Commit);
    }
}

基本上,所发生的一切都是CurrentCellDirtyStateChanged事件触发CellValueChanged事件,就是这样.如果您只是附加CellValueChanged事件,那么它只会在您离开单元格后触发.我不知道原因究竟是什么(考虑到它是一个复选框,是不是立刻"完成"了？),但这就是发生的事情.并且上面的代码工作,因为复选框在单击时更改为RIGHT.所以它有效.