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^ -Start of the Expression $ - End of the Expression \d -Any Digit * -Match o or more Occurring ? -End Group + -One or More 1. Decimal ^[0-9]+(\.[0-9]{1,2})?$ ^[0-9]+(\.[0-9][0-9]?)? 2. Date eg. 19/10/2010 ^[ 0 - 9 ]{ 2 }\[ 0 - 9 ]{ 2 }\[ 0 - 9 ]{ 4 }$ ^(([1-9])|(0[1-9])|(1[0-2]))\-((0[1-9]) |([1-31]))\-((\d{2})|(\d{4}))$ 3. Year  eg. 2012 ^d{4} 4. Year 1900-2099 ^[19/20]\d{2}$

To wrap the Text in source Code of Visual Studio         Ctrl  E + Ctrl  W     2.   To Format Ctrl A + Ctrl K + Ctrl D    3. To hide Tree View in Crystal Report :         CrystalReportViewer.DisplayGroupTree = false;   4. How to remove &amp;nbsp;  from Gridview           Include the line ConvertEmptyStringToNull="true" HtmlEncode="false"  HtmlEncodeFormatString="false"  in theBound field         eg.  <asp:BoundField DataField="Serial No" HeaderText="Serial No" ConvertEmptyStringToNull="true" HtmlEncode="false" HtmlEncodeFormatString="false" /> 5. To remove rows of the datatable while loading to the Combobox If the datatable contains 4 rows and u want only first two rows eg . Machine Accesories Spare oil Required only Machine Accesories then, ...