Question

我无法计算DataGridView中的已选中复选框。我想在选中复选框期间计算选中的复选框，并将选中项目的数量存储在标签中。我尝试了以下代码，但没有给出正确的计数：

    int num = 0;
    private void dgvLoadData_CellValueChanged(object sender, DataGridViewCellEventArgs e)
    {
        bool isChecked = Convert.ToBoolean(dgvLoadData.Rows[dgvLoadData.CurrentCell.RowIndex].Cells[0].Value.ToString());

        if (isChecked)
        {
            num+=1;
        }
        else
        {
            num-=1;
        }

        labelSelectedSum.Text = "Selected Items: " + num;
    }

Answer 1

在表格上应用CurrentCellDirtyStateChanged个事件。致电gridview.CommitEdit以更新复选框列的值。执行以下操作：

private void dgvLoadData_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
    if (dgvLoadData.IsCurrentCellDirty)
    {
        dgvLoadData.CommitEdit(DataGridViewDataErrorContexts.Commit);
    }
}

这将调用_CellValueChanged事件。不会对CellValueChanged事件中的代码进行任何更改：

int num = 0;
private void dgvLoadData_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
    bool isChecked = Convert.ToBoolean(dgvLoadData.Rows[dgvLoadData.CurrentCell.RowIndex].Cells[0].Value.ToString());

    if (isChecked)
    {
        num+=1;
    }
    else
    {
        num-=1;
    }

    labelSelectedSum.Text = "Selected Items: " + num;
}

Answer 2

您可以使用以下事件：CellContentClick和CellContentDoubleClick：

祝你好运！

int num = 0;
    private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {
        bool isChecked = (bool)dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].EditedFormattedValue;
        CheckCount(isChecked);
    }
    private void dataGridView1_CellContentDoubleClick(object sender, DataGridViewCellEventArgs e)
    {
        bool isChecked = (bool)dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].EditedFormattedValue;
        CheckCount(isChecked);
    }
    private void CheckCount(bool isChecked)
    {
        if (isChecked)
        {
            num++;
        }
        else
        {
            num--;
        }
        labelSelectedSum.Text = "Selected Items: " + num;
    }

Answer 3

我有一个DataTable绑定到我的DataGridView，我检查第一列是否有任何复选框选中这是我的例子：

private void dataGridViewMain_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
  if (e.ColumnIndex == 0)
  {
    int numberOfRow = dataTableCsvFile.AsEnumerable().Count(r => r[0].ToString() == true.ToString());
    buttonDataGridviewVerify.Enabled = numberOfRow > 0;
  }
}

当在c＃中更改Checkbox值时，如何计算DataGridView中的选中复选框？

3 个答案: