Data Controls :: Calculate Sum Of TextBox Column In GridView TemplateField On Button Click?

Nov 8, 2013

How to calculate sum of item template rows

<asp:GridView ID="GRDMonthly" runat="server" AutoGenerateColumns="False"
CellPadding="3" Font-Names="Georgia" ForeColor="#333333"
GridLines="None" Width="400px" CellSpacing="2"


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I have 5 gridviews, all of of them have a Checkbox template field. I already did SUM of a specific column in the gridviews and displayed the Total in the gridview footers.

There is a submit button on the page as well.(this is not in a template column in the gridview)

what i do is select some rows in the gridviews by ticking the checkbox. Then I click on the submit button and the values change in the database and page refreshes with the new Total in the gridview footers. Any row that was ticked. the checkbox for that row in the gridview gets disabled. so cannot change the value again.

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I have been struggling to either default the values to zero to start with, replace a null textbox with 0 before the calculate runs...but I can't get anything to really work. What is the best way to handle this?

Here is the aspx page:


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with reference to the below link

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