Check if datagridview cell is null or empty

This question already has an answer here:

What is a NullReferenceException, and how do I fix it? 33 answers

---

我会遍历使用类似下面的东西的单元格..

foreach (DataGridViewRow dgRow in dataGridView1.Rows)
{
    var cell = dgRow.Cells[7];
    if (cell.Value != null)   //Check for null reference
    {
        cell.Style.BackColor = string.IsNullOrEmpty(cell.Value.ToString()) ? 
            Color.LightCyan :   
            Color.Orange;       
    }
}

---

You don't need ToString() . See here.

The below code is enough.

string conte = dataGridView1.Rows[rowIndex].Cells[7].Value;

Also you may try something like:

if (string.IsNullOrEmpty(dataGridView1.Rows[0].Cells[7].Value as string))

链接地址: http://www.djcxy.com/p/28048.html

上一篇: 对象引用未设置为ASP.NET中对象的实例

下一篇: 检查datagridview单元格是否为空或空