Error in leave even customization

Epicor ERP 10
1

I have created an event that checks to make sure that a field only contains numbers when leaving the field. I got that to work, but now the issue is when I click in the field then click out without typing anything, I get an error. My code is below. followed by the error.

private void txtSSNum_Leave(object sender, System.EventArgs args)
	{
        // ** Place Event Handling Code Here **
        var ssnum = txtSSNum.Value.ToString();
        //(TEST) MessageBox.Show(ssnum);
        try
        {
            int num = Convert.ToInt32(ssnum);
        }
        catch (Exception)
        {
            MessageBox.Show("Shipset Number Cannot Contain Letters.");
            txtSSNum.Value = " ";
        }
	}

Application Error

Exception caught in: App.SalesOrderEntry.SalesOrderForm.EP.Customization.OrdEntryCustomization.CustomCode.0

Error Detail

Message: Object reference not set to an instance of an object.
Program: App.SalesOrderEntry.SalesOrderForm.EP.Customization.OrdEntryCustomization.CustomCode.0.dll
Method: txtSSNum_Leave

Client Stack Trace

at Script.txtSSNum_Leave(Object sender, EventArgs args)
at System.Windows.Forms.Control.OnLeave(EventArgs e)
at Infragistics.Win.UltraWinEditors.TextEditorControlBase.OnLeave(EventArgs e)
at System.Windows.Forms.Control.NotifyLeave()
at System.Windows.Forms.ContainerControl.UpdateFocusedControl()

2

Does the Code validate? Try Actions > Test Code (F5).
I suspect that the object txtSSNum does not exist.

3

Either txtSSNum doesn’t exist or txtSSNum.Value is null instead of String.Empty like you’re expecting. Try placing the var ssnum assignment inside the try block.

4

It complies successfully and the txtSSnum is a UD field. Moving the declaration of the variable inside the try statement seems to work, thank you.

5

If it’s a UD field, you should use the dataView and not the controls.

6

correct the code as below and check.

var ssnum = Convert.ToString(txtSSNum.Value);