report viewer rdlc sum error | visual Studio | Report error C#
RDLC Tablix sum error.
Sum of columns from Tablix in textBox shows ERROR in RDLC
Expression: =Sum(Fields!Col.Value, "DataSource")
Problem Solution:
1. click on DataSet.xsd
2. select the data table's column which you want to calculate.
3. on the left side in DATA select DATA TYPE and change the data type from System.string
to System.Int32. in this way change all the columns you want to calculate.
4. Right-click on DataSet and click Save.
5. Start the application and check.
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