I have a problem in update-database code-first in project ASP.NET MVC

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I have A problem in update-database Code-First in project asp.net mvc
i add-migration and it's Done
but when i update database the error is shown to me
"Instance Failure"
and i need your help

What I have tried:

C#

my dbContext Class
    public class MyDbContext:DbContext
    {
   
        public DbSet<organization> Organization { get; set; }
        public DbSet<outlet> outlets { get; set; }
        public DbSet<employee> Employees { get; set; }
        public DbSet<expensedetail> ExpenseDetails { get; set; }
        public DbSet<expensecatagory> ExpenseCatagories { get; set; }
        public DbSet<expense> Expenses { get; set; }
        public DbSet<expenseitem> ExpenseItem { get; set; }
        public DbSet<incomevm> IncomeVm { get; set; }
        public DbSet<item> Item { get; set; }
        public DbSet<itemcategory> ItemCategories { get; set; }
        public DbSet<party> Party { get; set; }
        public DbSet<purchase> Purchase { get; set; }
        public DbSet<purchasedetail> PurchaseDetails { get; set; }
        public DbSet<sale> Sale { get; set; }
        public DbSet<salesdetail> SalesDetails { get; set; }
        public DbSet<stockvm> StockVm { get; set; }

    
    }
}


my Connection string is :

<connectionstrings>
    <add name="MyDbContext" connectionstring="Integrated Security=true;Initial Catalog=ERPapp;Data Source=DESKTOP-VTLRB7T\\SQLEXPRESS;" providername="System.Data.SqlClient">

Posted 22-Jul-20 12:28pm

ahmedbelal

Updated 22-Jul-20 21:32pm

Patrice T

v2

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Comments

Richard Deeming 24-Jul-20 7:04am

Don't try to paraphrase error messages. Just paste the entire error message into your question, making sure to censor any private details like passwords.

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Sandeep Mewara · Answer 1 · 2020-07-22T19:46:00

Check for these:

1. There might be an error with your SQL Server instance..

Make sure your SQL Server instance(MSSQLSERVER) is running. To check in services list:
a. open run dialog box and type: "services.msc" (without quotes) and hit Enter.
b. services management console opens up - check whether your instance in running or not.

2. Try to change your connection string section in web.config to look like:

HTML

<connectionstrings>
    <add name="MyDbContext" connectionstring="Data Source=DESKTOP-VTLRB7T\SQLEXPRESS;Initial Catalog= ERPapp;Integrated Security=true;" providername="System.Data.SqlClient"></add> 
</connectionstrings>

3. If the problem still persists, then try using: Data Source=.\SQLEXPRESS instead