c# winform Hello - I need to set the column headers of 2 datagridviews in code. without settingthem - my app takes 12 seconds to load. With setting them- 26 seconds. I find that unacceptable so maybe you know of another implementation. Mine is
(for the sake of simplicity - I set here the headercell as a running number - but the time consumed is just the same...: 14 seconds!!!)
int cn = 0;
string cName = string.Empty;
while (cDgv < dgv.Columns.Count)
{
cn++;
cName = cn.ToString();
dgvHeader.Columns[cDgvH].HeaderText = cName;
dgv.Columns[cDgv].HeaderText = cName;
cDgvH++;
cDgv++;
}
dgv and dgvHeader are my 2 datagridview
each dgv has 380 columns
the code is called within the Load function
Thanks in advance
Gil Yoktan

Hi Gil Yoktan,

The cause of the low performance is that too many columns are added in the DataGridView. From my experience, we can set the header text of the columns in the constructor of the form which would be faster than in the Load event handler. If we need to pass the header text to the form, we can create a new constructor which takes a string list as the parameter. This is a code snippet:
public Form1(List<string> colHeaderText)

{

InitializeComponent();

const int count = 360;

//Add the columns.

for (int i = 0; i < count; i++)

{

this.dataGridView1.Columns.Add(i.ToString(),i.ToString());

}

//Set the header text of the columns.

for (int i = 0; i < count; i++)

{

this.dataGridView1.Columns[i].HeaderText = colHeaderText[i];

}

}

Let me know if this does not help.
Aland Li

---

Please mark the replies as answers if they help and unmark if they don't. This can be beneficial to other community members reading the thread.

Hi Gil Yoktan,

The cause of the low performance is that too many columns are added in the DataGridView. From my experience, we can set the header text of the columns in the constructor of the form which would be faster than in the Load event handler. If we need to pass the header text to the form, we can create a new constructor which takes a string list as the parameter. This is a code snippet:
public Form1(List<string> colHeaderText)

{

InitializeComponent();

const int count = 360;

//Add the columns.

for (int i = 0; i < count; i++)

{

this.dataGridView1.Columns.Add(i.ToString(),i.ToString());

}

//Set the header text of the columns.

for (int i = 0; i < count; i++)

{

this.dataGridView1.Columns[i].HeaderText = colHeaderText[i];

}

}

Let me know if this does not help.
Aland Li

---

Please mark the replies as answers if they help and unmark if they don't. This can be beneficial to other community members reading the thread.

Thanks Aland
I'll try it and let you know
Have a nice day
Gil Yoktan