C# check if datagridview column is empty

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I want to check if my "many" column in datagridview is empty.

here my code

C#

for (int i = 0; i < (gridx.Rows.Count - 1); i++)
        {
            col = gridx.Rows[i].Cells["code"].Value.ToString();
            col4 = gridx.Rows[i].Cells["many"].Value.ToString();                
        }
if (col4 == "")
        {
            MessageBox.Show("Many is empty");
            this.Focus();
            return;
        } 
else
{
//my code in here
}

but it don't show error "many is empty"

please help me.. and thanks before

Posted 14-Jun-12 23:10pm

Member 8743576

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Comments

Member 14887694 5-Mar-22 16:29pm

what if you want to check for two or more columns at the same time?

3 solutions

Solution 1

Well, without debugging you can never be sure what data you are getting. As far as comparision with empty string is concerned, I would use String.IsNullOrWhiteSpace[^] Method. It checks more conditions tha just an empty string.

Posted 14-Jun-12 23:20pm

Manas Bhardwaj

Solution 3

Cell has FormattedValue property which gets formatted representation of object contained as cell's value, i.e. if cell.Value is null you'll see empty string and so on.

C#

foreach(DataGridViewRow row in yourDatagridView.Rows)
{   
    if(string.IsNullOrWhiteSpace(row.Cells["many"].FormattedValue))
    {
        MessageBox("BOOM! Many is empty",":(");
        return;
    }
}

//rest of your code here

Posted 15-Jun-12 0:49am

Oshtri Deka

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Vani Kulkarni · Accepted Answer · 2012-06-14T23:20:00

Solution 2

See if below code helps:

C#

bool flag = false;
foreach(DataGridViewRow row in gridx)
{
  if(Convert.ToString(row.Cells["many"].Value) == string.Empty)
     flag = true;
}

if(flag)
  MessageBox.Show("Many is empty");
else
 // your code

Posted 14-Jun-12 23:20pm

Vani Kulkarni

Comments

Member 8743576 15-Jun-12 8:41am

thank you very much sir... it works

Vani Kulkarni 18-Jun-12 1:12am

You are welcome :)

Member 11021749 30-Aug-14 13:40pm

thank uu

markwhite1 24-Jan-17 1:16am

I was getting an error `foreach statement cannot operate on variables of type 'System.Windows.Forms.DataGridView' because 'System.Windows.Forms.DataGridView' does not contain a public definition for 'GetEnumerator'` So I added `foreach(DataGridViewRow row in dgvitem.Rows)` and it worked