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I am creating a dll at run time. When i need to refer that dll i have to laod the assembly and get the reference. Till here its working fine but now if i recompile this assembly to modify it message comes that this assembly can't be loaded as it is in progress.So before recompiling i have to unload that assembly.
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You can't unload assemblies. You can unload application domain which hosts these assemblies. So all the assemblies will get unloaded. BTW, what this has to do with ASP.NET ?
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I have to dynamically load and unload assemblies in .net website so that the assembly can be modified at runtime and recompiled.Assemblies can not be unloaded but how using appdomain i can unload an assembly.I am compiling my assembly at one page and using it by loading the assemble in different page.
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in the Page_Unload Event,
make the object to null
it will be nullified and no problem will be in future compiling
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This is the object of the class i am making.This object is used to get the methods of the assembly using reflection.Can u pls tell me which object i will make null?
Dim asm As [Assembly] = [Assembly].LoadFile(System.Web.HttpRuntime.AppDomainAppPath & "Bin\Mytext.dll")
Dim objAssembly As System.Reflection.Assembly = asm
Dim objTheClass As Object = objAssembly.CreateInstance("DynamicClass")
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objAssembly
Make it null in the page unload event
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Hello All,
I am using ASP.NET 2005(C#). I want to show and save the excel file on server. For this I opened excel file in iframe and kept a save button outside the iframe. On Page Load I have the following code:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
try
{
string fileName = AppDomain.CurrentDomain.BaseDirectory + "SaveExcelFile\\Excel1.xls";
Microsoft.Office.Interop.Excel.Application ObjExcel = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook ObjWB;
Microsoft.Office.Interop.Excel.Worksheet ObjWS;
Object missing = System.Reflection.Missing.Value;
if (ObjExcel == null)
{
throw (new Exception("Unable to Start Microsoft Excel"));
}
else
{
ObjExcel.Visible = true;
ObjExcel.DisplayAlerts = false;
ObjWB = ObjExcel.Workbooks._Open(fileName, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing);
ObjWS = (Microsoft.Office.Interop.Excel.Worksheet)ObjWB.ActiveSheet;
Session["ExcelObject"] = ObjExcel;
Session["WorkBook"] = ObjWB;
Session["WorkSheet"] = ObjWS;
htxtFileName.Value = "SaveExcelFile/Excel1.xls";
}
}
catch (Exception ex)
{
Response.Write("Page Load Error : " + ex.Message);
}
}
}
and On Save Button Click event I have the following code:
protected void btnSaveFileToServer_Click(object sender, EventArgs e)
{
try
{
if (Session["ExcelObject"] != null && Session["WorkBook"] != null && Session["WorkSheet"] != null)
{
Microsoft.Office.Interop.Excel.Application ObjExcel = (Microsoft.Office.Interop.Excel.Application)Session["ExcelObject"];
Microsoft.Office.Interop.Excel.Workbook ObjWB = (Microsoft.Office.Interop.Excel.Workbook)Session["WorkBook"];
Microsoft.Office.Interop.Excel.Worksheet ObjWS = (Microsoft.Office.Interop.Excel.Worksheet)Session["WorkSheet"];
ObjExcel.ThisWorkbook.Save();
}
}
catch (Exception ex)
{
Response.Write("ERROR : " + ex.Message);
}
}
The above code works fine on my machine but when I deploy it on server it gives error "ERROR : Exception from HRESULT: 0x800A03EC" while saving the file back to server.
Please help me.
Thanks in advance.
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Have you tried googling with the error message as the search string. You might find what it means.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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Thanks Paul for replying. Yes I have tried but didnt get much help 
I am not able to figure out what is the exact problem in the code.
Please help me...
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I've seen this kind of thing happen when there is an instance of Excel, ( or Word, doesn't really matter when using Office Interop ) that is not closed, and a New is invoked the second time through. I'd put a check in your code to make sure you are creating a single instance of Excel, and closing that instance when done with it.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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In btnSaveFileToServer_Click....
ASP.NET 2.0 wrote: Microsoft.Office.Interop.Excel.Worksheet ObjWS = (Microsoft.Office.Interop.Excel.Worksheet)Session["WorkSheet"];
ObjExcel.ThisWorkbook.Save();
Add something like ObjExcel.Quit, so you can dispose of the Excel app when done with it.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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thanks for the reply Paul, but its not working. now the error is coming on page load it self and excel file is not getting saved 
Please help me...
Thanks again.
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Well, it's late here. I'm curious as to why this is a problem. I'll write my own little mock up of your code you are trying to do and see what is up. Stay tuned 
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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hey thanks Paul. I am trying this from yesterday but
First I was getting Error "Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80070005."
I solved that but now getting this error.
Thanks again.
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Hi,
I tried your code, I get the error even in my local dev machine.
The error when executing the line "ObjExcel.ThisWorkbook.Save();" is : "Exception from HRESULT: 0x800A03EC".
If you find the solution for the above, pls help me out to solve.
Thanks
Priya
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How to create a setup file for a webbased project which is developed in vs2003/msaccess.
I have created and installed.but it is unable to open.
How to give url??and step step by process i need.please give the steps to create.
i found something on the net but it is now so useful.let me know if anybody is free.
kissy
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Kissy16 wrote: but it is unable to open.
What is unable to open?
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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the generated setup file,i have installed in a PC but it is not opening.
kissy
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Does the target PC have the installer requirements to open the setup file? I've run into some machines that need to have the latest version of the Windows Installer stuff installed before setup files will work. Not sure if this is the case in your situation, but I'd double check that.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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Hi All,
I have developed a ASP.NET application and I am using XML webservice.
In there I have set the timeout property as 10 minitues. But I am getting following error after one minitue.
The underlying connection was closed: The connection was closed unexpectedly.
code part is as follows
lobjService = new MyService();
lobjService .Timeout = 10 * 60 * 1000;
object[] results = lobjService .AgentAvailabilities(lobjCriteria);
How can I avoid the exception and take results? .
thanks in advance.
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Hi i want to show my update progress bar in inside modal popup control...,
And same time the parent form have to be disable mode...,
Plz any one guide me
Thanks & Regards,
NeW OnE,
please don't forget to vote on the post
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To do this, you need to make your calls using AJAX, so that you can update your page during it's progress.
Christian Graus
No longer a Microsoft MVP, but still happy to answer your questions.
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Hi friends
How import print options in Report viewer? I am using Report viewer control in
my application. But the print image doesnt appear in my application. what wil i
do? I searched in msdn also. They give that to install Activex control. I cant
understood friends. Because without print image how can i print the page?
please give the solutions. Its very important me.
Hopes for ur's reply.
Thanks
Every Successful Person Have A Painful Story
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Hi,
i am developing a website, in that lot of advertisements are there, there is no particular to display the advertisement, means the Advertisement can be in .swf format, .jpg/.gif in any of the format, that is user's choice, for that i am checking the extension and binding to the StringBuilder and assigning to span tag, now it is working fine, but i want server side click event for each image, because client wants no.of clicks on each image so, it needs to store in the database.
Can you please help me out, if any one have solution for this?
Thanks & Regards
Murthy
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