how to find the total sum of particular column using C#?
<p>Suppose In database their is column called INCOME_PER_DAY. I bring data of this column in the gridview .</p>

<p>Now  My question is that I want to find the total sum of the column INCOME_PER_DAY using C# .how to do this? </p>

<p>Please tell me. </p>
