Hi all,i could not able to solve the problem
Object reference not set to an instance of an object.
i an uploading an excel and it calculates the values and gives the output for one filename which in compatibility mode.after uploading another file it gives the following error
..please help
Server Error in '/' Application.
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 642: finally
Line 643: {
Line 644: workbook.Close(Missing.Value, Missing.Value, Missing.Value);
Line 645: application.Quit();
Line 646: this.releaseObject(xlWs);
Source File: c:\Users\ccbt\Desktop\PPDM_TEST_HITVALIDATION_MODULE\SECONDARY_VALUES_STORAGE\SECONDARY_VALUES_STORAGE\test123.aspx.cs Line: 644
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
SECONDARY_VALUES_STORAGE.test123.GetExcel(String fileName) in c:\Users\ccbt\Desktop\PPDM_TEST_HITVALIDATION_MODULE\SECONDARY_VALUES_STORAGE\SECONDARY_VALUES_STORAGE\test123.aspx.cs:644
SECONDARY_VALUES_STORAGE.test123.btnUpload_Click_Click(Object sender, EventArgs e) in c:\Users\ccbt\Desktop\PPDM_TEST_HITVALIDATION_MODULE\SECONDARY_VALUES_STORAGE\SECONDARY_VALUES_STORAGE\test123.aspx.cs:208
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +9553594
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +103
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1724