Check whether an Object is empty or null

Question

I have a DataGridView and added a column called SellQty and a Checkbox at index 0. User has to enter int value when he selects a checkbox. If not I am showing a message to enter the value. Now the problem is I am getting the value from the SellQty cell and storing it in an object and checking whether it is null.

object SellQty = gvProductBatch.Rows[i].Cells["txtSellQty"].Value;
if(SellQty!=null)
    // do something

else 
    // ..Show message.

This works fine. But the problem is when the user enters a value and deletes it, the value stored in it is {} i.e. empty. I would like to know how to check an object is empty. I have googled for the same but didn't find answer to handle empty object. All results were for if object is null.

Solution

You can get the actual edited Value by using the .EditedFormattedValue

if (string.IsNullOrWhiteSpace(gvProductBatch.Rows[i].Cells["txtSellQty"].EditedFormattedValue.ToString())
{
  //Do something
}

Comments

[Prathap]

I am using 3.5.Anywaz I have used NullorEmpty and it works great.Thanks mate.Can you just explain a bit about this line of code.

[spajce]

heres the msdn reference will explain to you. welcome :)

[Prathap]

Gone through it.Thanks.I have changed the validation and calculations in my entire module.It works great. I didn't handle this exception when user enters a white space in whole module.Now it works great

[spajce]

you use like this way. if (gvProductBatch.Rows[i].Cells["txtSellQty"].EditedFormattedV‌​alue.ToString().Trim‌​().Length == 0) { //Do something }