When I click the save button this error is coming

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Don´t want to show this error. otherwise shows the popup with error message instead of this error

What I have tried:

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 641:
Line 642:                Dictionary<string, string> projectConfigs = ProjectConfig.GetValueFromProject(InfoClientBaseItem, client.IdProject, new List<string> { "NewClientFirstEmail", "NewPasswordPage" });
Line 643:                projectConfigs.TryGetValue("NewClientFirstEmail", out string templateName);
Line 644:                projectConfigs.TryGetValue("NewPasswordPage", out string newpasswordPage);
Line 645:                string template = EmailTemplates.EmailTemplate.GetTemplateByName(templateName);

Source File: C:\Users\VinothiniManoharan\Source\Repos\HCAlertV200\HCWeb\newSite\rawInterview.aspx.cs    Line: 643

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   HCWeb.newSite.rawInterview.btnSaveIntegrateClient_Click(Object sender, EventArgs e) in C:\Users\VinothiniManoharan\Source\Repos\HCAlertV200\HCWeb\newSite\rawInterview.aspx.cs:643
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +137
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +149
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5439

Posted 1-Sep-22 0:25am

Member 15431526

Updated 1-Sep-22 1:50am

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OriginalGriff · Answer 1 · 2022-09-01T01:50:00

Quote:
Object reference not set to an instance of an object.

This is one of the most common problems we get asked, and it's also the one we are least equipped to answer, but you are most equipped to answer yourself.

Let me just explain what the error means: You have tried to use a variable, property, or a method return value but it contains null - which means that there is no instance of a class in the variable.
It's a bit like a pocket: you have a pocket in your shirt, which you use to hold a pen. If you reach into the pocket and find there isn't a pen there, you can't sign your name on a piece of paper - and you will get very funny looks if you try! The empty pocket is giving you a null value (no pen here!) so you can't do anything that you would normally do once you retrieved your pen. Why is it empty? That's the question - it may be that you forgot to pick up your pen when you left the house this morning, or possibly you left the pen in the pocket of yesterday's shirt when you took it off last night.

We can't tell, because we weren't there, and even more importantly, we can't even see your shirt, much less what is in the pocket!

Back to computers, and you have done the same thing, somehow - and we can't see your code, much less run it and find out what contains null when it shouldn't.
But you can - and Visual Studio will help you here. Run your program in the debugger and when it fails, it will show you the line it found the problem on. You can then start looking at the various parts of it to see what value is null and start looking back through your code to find out why. So put a breakpoint at the beginning of the method containing the error line, and run your program from the start again. This time, the debugger will stop before the error, and let you examine what is going on by stepping through the code looking at your values.

But we can't do that - we don't have your code, we don't know how to use it if we did have it, we don't have your data. So try it - and see how much information you can find out!