runtime error project source code not found and invalid string null exception? [closed]

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Closed 3 years ago.

My code was running and i compiled and executed many times in 3days but suddenly error appears sourrce code not found i resolved it by installing extension of source code assembly but still there is 1 error

even i have removed connection string class but still runtime error while starting a project

check image the error appears qwhen project is run or build

code for subnew

 Public Sub New()
    InitializeComponent() 

    End Sub

回答1:

You have to use One More Slash in Your Connection String To get rid of escape Sequence as

Public DBConn As String = @"Data Source=.\SQLEXPRESS;Initial Catalog=Quotient;Integrated Security=True"

OR

Public DBConn As String = "Data Source=.\\SQLEXPRESS;Initial Catalog=Quotient;Integrated Security=True"

You must put "@" sign before Connection String as it there is a Escape Sequence ("\") in Connection String

回答2:

The problem is solved by recreating form and copy pasting contents from form1 to form3 new and then renaming it to FORM1 and deleting existing form1

来源：https://stackoverflow.com/questions/34465702/runtime-error-project-source-code-not-found-and-invalid-string-null-exception