C# 从 DataGridViewCheckBoxCell 获取值

Get value from DataGridViewCheckBoxCell

提问by Bryan Arbelo - MaG3Stican

I am working on a DataGridViewcalled ListingGridtrying to activate / deactivate users that have been "checked" on any DataGridViewCheckBoxCellthat is inside the DataGridViewCheckBoxColumn.

我工作的一个DataGridView叫ListingGrid试图对任何已被“选中”激活/停用用户DataGridViewCheckBoxCell是内部的DataGridViewCheckBoxColumn。

This is the way im trying to do that :

这是我尝试这样做的方式：

foreach (DataGridViewRow roow in ListingGrid.Rows)
{
    if ((bool)roow.Cells[0].Value == true)
    {
        if (ListingGrid[3, roow.Index].Value.ToString() == "True")
        {
            aStudent = new Student();
            aStudent.UserName = ListingGrid.Rows[roow.Index].Cells[2].Value.ToString();
            aStudent.State = true;
            studentList.Add(aStudent);

        }
    }
}

As far as I get, when you check a DataGridViewCheckBoxCell, the value of the cell is trueright? But it is not allowing me to convert the value to bool and then compare it, throwing me an invalid cast exception.

据我所知，当您检查 a 时DataGridViewCheckBoxCell，单元格的值是否true正确？但是它不允许我将值转换为 bool 然后比较它，从而抛出一个无效的强制转换异常。

采纳答案by Developer

try:

尝试：

DataGridViewCheckBoxCell chkchecking = roow.Cells[0] as DataGridViewCheckBoxCell;

    if (Convert.ToBoolean(chkchecking.Value) == true)
{
}

or

或者

DataGridViewCheckBoxCell chkchecking = roow.Cells[0] as DataGridViewCheckBoxCell;

        if ((bool)chkchecking.Value == true)
    {
    }

回答by Pruno

I think == trueis not useful and you have to check if your cell is not DBNull:

我认为== true没有用，您必须检查您的单元格是否不是DBNull：

if (chkchecking.Value != DBNull.Value)

回答by Nabil

I do it usually like this bool value = (short)chkchecking.Value == 1

我通常这样做 bool value = (short)chkchecking.Value == 1