How to check if dataGridView checkBox is checked?

问题

I'm new to programming and C# language. I got stuck, please help. So I have written this code (c# Visual Studio 2012):

private void button2_Click(object sender, EventArgs e)
{
    foreach (DataGridViewRow row in dataGridView1.Rows)
    {
         if (row.Cells[1].Value == true)
         {
              // what I want to do
         }
    }
}

And so I get the following error:

Operator '==' cannot be applied to operands of type 'object' and 'bool'.

回答1:

You should use Convert.ToBoolean() to check if dataGridView checkBox is checked.

private void button2_Click(object sender, EventArgs e)
{
    foreach (DataGridViewRow row in dataGridView1.Rows)
    {
         if (Convert.ToBoolean(row.Cells[1].Value))
         {
              // what you want to do
         }
    }
}

回答2:

All of the answers on here are prone to error,

So to clear things up for people who stumble across this question,

The best way to achieve what the OP wants is with the following code:

foreach (DataGridViewRow row in dataGridView1.Rows)
{
    DataGridViewCheckBoxCell cell = row.Cells[0] as DataGridViewCheckBoxCell; 

    //We don't want a null exception!
    if (cell.Value != null)
    {
        if (cell.Value == cell.TrueValue)
        {
           //It's checked!
        }  
    }              
}

回答3:

Value return an object type and that cannot be compared to a boolean value. You can cast the value to bool

if ((bool)row.Cells[1].Value == true)
{
    // what I want to do
}

回答4:

Slight modification should work

if (row.Cells[1].Value == (row.Cells[1].Value=true))
{
    // what I want to do
}

回答5:

if (Convert.ToBoolean(row.Cells[1].EditedFormattedValue))
{
    //Is Checked
}

来源：https://stackoverflow.com/questions/20452844/how-to-check-if-datagridview-checkbox-is-checked

标签

visual-studio-2012

datagridviewcheckboxcell