你如何阅读DataGridViewCheckBoxColumn的vaue？ [英] How do you read the vaue of a DataGridViewCheckBoxColumn ?

问题描述

大家好;



我有一个带有DataGridView控件的Windows窗体，我想要读取的多个DataGridViewCheckBoxColumn类型列（选中或取消选中） 。一切都是无限的。



现在这当然应该是最简单的事情，但事情并没有发挥作用。例如，我有一个名为选项的列，我想查看是否选中了特定行的选项复选框。只是为了好玩，阅读价值并将其显示在一个消息框中：



我试过了

Hi all;

I have a Windows form with a DataGridView control, and there are several columns of type DataGridViewCheckBoxColumn that I want to read (checked or unchecked). Everything is unbounded.

Now this of course should be the simplest thing, but something isn''t working as it should. For example, I have a column called "Options", and I want to see if a particular row''s "Options" checkbox is checked or not. Just for fun, read the value and display it in a message box:

I''ve tried

if (dataGridView.Rows[dataGridView.CurrentCell.RowIndex].Cells[dataGridView.Columns["Options"].Index].Value  != null)
    {
        // Do some stuff
        MessageBox.Show(dataGridView.Rows[dataGridView.CurrentCell.RowIndex].Cells[dataGridView.Columns["Options"].Index].Value.ToString());
    }

我也试过

and I''ve also tried

DataGridViewCheckBoxCell cbox = new DataGridViewCheckBoxCell();
cbox = dataGridView.Rows[dataGridView.CurrentCell.RowIndex].Cells[dataGridView.Columns["Options"].Index];
if (cbox.Value  != null)
    {
        // Do some stuff
        MessageBox.Show(cbox.Value.ToString());
    }

无论何时选中或取消选中此框，值始终为

Whenever I check or uncheck the box, the value is always

null

因此显示MessageBox的代码永远不会运行。



我知道我遗漏了一些基本的东西，但我看不到它。为什么我一直在阅读

and so the code to show the MessageBox never runs.

I know I''m missing something basic, but I can''t see it. Why am I reading

null

，无论复选框状态如何？

all the time, regardless of the checkbox state?

推荐答案

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
   DataGridViewCheckBoxCell checkbox = (DataGridViewCheckBoxCell)dataGrid_ModelControls.CurrentCell;

     bool isChecked = (bool)checkbox.EditedFormattedValue;

}

试试这个....

Try this ....

我刚试过你的代码：

I just tried your code:

private void button1_Click(object sender, EventArgs e)
    {
    dgvData.Rows.Add(true);
    dgvData.Rows.Add(false);
    dgvData.Rows.Add(true);
    dgvData.Rows.Add(false);
    }


private void button2_Click(object sender, EventArgs e)
    {
    if (dgvData.Rows[dgvData.CurrentCell.RowIndex].Cells[dgvData.Columns["chkBox"].Index].Value != null)
        {
        // Do some stuff
        MessageBox.Show(dgvData.Rows[dgvData.CurrentCell.RowIndex].Cells[dgvData.Columns["chkBox"].Index].Value.ToString());
        }
    }

我得到的只是真实或假，正如我所料。



你确定它正在执行该代码吗？因为你通常不会得到一个MessageBox - 你会得到一个NullReferenceException，因为你调用ToString的值必须为null - 这不会起作用！

And all I get is "true" or "false", as I would expect.

Are you sure it is executing that code? Because you would not normally get a MessageBox - you would get a NullReferenceException as the value you are calling ToString on would have to be null - which won''t work!

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