How to calculate the sum of the datatable column in asp.net?
To calculate the sum of a column in a DataTable use the DataTable.Compute method.
Example of usage from the linked MSDN article:
DataTable table = dataSet.Tables["YourTableName"];// Declare an object variable.object sumObject;sumObject = table.Compute("Sum(Amount)", string.Empty);Display the result in your Total Amount Label like so:
lblTotalAmount.Text = sumObject.ToString();
this.LabelControl.Text = datatable.AsEnumerable() .Sum(x => x.Field<int>("Amount")) .ToString();If you want to filter the results:
this.LabelControl.Text = datatable.AsEnumerable() .Where(y => y.Field<string>("SomeCol") != "foo") .Sum(x => x.Field<int>("MyColumn") ) .ToString();
You can do like..
DataRow[] dr = dtbl.Select("SUM(Amount)");txtTotalAmount.Text = Convert.ToString(dr[0]);