Data Controls :: Check For NULL Values Sum And Display Values In GridView Cells

Apr 3, 2013

i am using a gridview in my web page,i used to bind the database records to the columns are name,empid,company name,pl leave,sl leave,total leave taken here total leave taken is not a database fields,in the page i want to fill the records once loaded pl leave and sl leave is added and display in the total leave taken working properly when all pl ans sl columns fill with numbers,if some pl and sl leave having blank showing an error like input sting was not in correct format..this is my code


<asp:BoundField DataField="slno" HeaderText="SerialNo"
SortExpression="slno" />
<asp:BoundField DataField="ecode" HeaderText="Employee Code"
SortExpression="empcode" />
<asp:BoundField DataField="ename" HeaderText="Employee Name"


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