输入字符串格式不正确

Question

Have been trying this for days now, i want to view my recorded data for an update purpose by double clicking on the informations from data grid view, meanwhile i get "Input String was not in a correct format" error. My code:

private void dgvGroundtech_Double Click(object sender, EventArgs e){

if(dgvGroundtech.CurrentRow.Index != -1)
{
Id = Convert.ToInt32(dgvGroundtech.CurrentRow.Cells[0].ToString());
txtName.Text = dgvGroundtech.CurrentRow.Cells[1].ToStrings();
   txtItem.Text = dgvGroundtech.CurrentRow.Cells[2].ToStrings();
   txtMobileNumber.Text = dgvGroundtech.CurrentRow.Cells[3].ToStrings();
   cmbPurpose.Text = dgvGroundtech.CurrentRow.Cells[4].ToStrings();
   txtAddress.Text = dgvGroundtech.CurrentRow.Cells[5].ToStrings();
   txtAmount.Text = dgvGroundtech.CurrentRow.Cells[6].ToStrings();
   txtDate.Text = dgvGroundtech.CurrentRow.Cells[7].ToStrings();
}
}

Answer 1

This line will potentially throw a format exception.

Id = Convert.ToInt32(dgvGroundtech.CurrentRow.Cells[0].ToString());

Check the values for this

dgvGroundtech.CurrentRow.Cells[0].ToString()

do not fall into this category::

"value does not consist of an optional sign followed by a sequence of digits (0 through 9)."