我想检查 datagridview 列是否有数据或空/空

Question

I want to check if my datagridview value stored in column[2] is empty or null.

How can I access datagridview column?

string[] row = new string[]
{ 
  Convert.ToString(dataReader[0]),
  Convert.ToString(dataReader[1]),
  Convert.ToString(dataReader[2]),
  Convert.ToString(dataReader[3])
};
dataGridView1.Rows.Add(row);

Answer 1

whit this code you can access column from your DataGridView

foreach (DataGridViewColumn col in dataGridView1.Columns)

but for checking null values you should check the cells not the column, so just add another for to count your rows and check every cells of your specific column

your code will be like this:

for (int colCounter=0 ; colCounter<dataGridView1.Columns.Count; colCounter++)
 for(int rowCounter=0 ; rowCounter<dataGridView1.Rows.Count ; rowCounter++)
   if(DataGridView1.Rows[rowCounter].Cells[colCounter].Value.tostring()==null)
    //your code

Answer 2

I think you need to use a loop to add those data in your datagridview like this:

foreach(var data in row)
{
    dataGridView1.Rows.Add(data);
}