Detailed Error:

Exception of type 'System.Web.HttpUnhandledException' was thrown.

Detailed Error Message:

Cannot cast DBNull.Value to type 'System.Int32'. Please use a nullable type.

at System.Data.DataRowExtensions.UnboxT`1.ValueField(Object value) at System.Data.DataRowExtensions.Field[T](DataRow row, String columnName) at LocalBodyWiseWelfareInstitutionsandHostelReports.b__5(DataRow row) in d:\WWR\rationmitra\WelFareInstitutions\Public\LocalBodyWiseWelfareInstitutionsandHostelReports.aspx.cs:line 58 at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() at System.Linq.Enumerable.Sum(IEnumerable`1 source) at System.Linq.Enumerable.Sum[TSource](IEnumerable`1 source, Func`2 selector) at LocalBodyWiseWelfareInstitutionsandHostelReports.WelfareInstituteandHostel() in d:\WWR\rationmitra\WelFareInstitutions\Public\LocalBodyWiseWelfareInstitutionsandHostelReports.aspx.cs:line 58 at LocalBodyWiseWelfareInstitutionsandHostelReports.Page_Load(Object sender, EventArgs e) in d:\WWR\rationmitra\WelFareInstitutions\Public\LocalBodyWiseWelfareInstitutionsandHostelReports.aspx.cs:line 30 at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)