Web Forms :: How To Handle Format Exception When Nothing Is Entered In Textbox

Dec 28, 2011

I am converting the entered values in textbox into decimal values to saev in sql table. In case user does not enter any value i get a Format exception. How do i handle this..

My code is as below

DMLObj.Add("ItemID", Convert.ToInt32(drpitemname.SelectedValue).ToString());
DMLObj.Add("SupplierName", Convert.ToInt32(drpvendor.SelectedValue).ToString());
DMLObj.Add("Quantity", Convert.ToDecimal(txtqty.Text).ToString());//qty.ToString());
DMLObj.Add("Unit", Convert.ToInt32(drpunit.SelectedValue).ToString());

[Code] ....

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