Lengkap

Entity Framework Code First Migrations Error - "Sequence contains more than one element."

I am building an application which utilizes code first migrations in entity framework.

Previously, I have been able to add migrations and update the database, however, recently I added a c# class to the application and added the migration. Now when I update the database I get the error message "Sequence contains more than one element." I cannot figure why this is happening and I need some one to help me with code so I can correct this issue and update the database.

Kemahiran: Pengaturcaraan C#, .NET

Lihat lagi: code first entity framework, entity framework code first, code first migrations existing database, entity framework code first existing database stored procedure, entity framework code first call stored procedure with parameters, how to use stored procedure in entity framework code first, entity framework code first json, entity framework code first migrations, entity framework code first existing database, mvc entity framework code first sample, entity framework code first create database, entity framework code first deploy to production, asp net mvc application using entity framework code first, asp.net core entity framework code first, entity framework code first add table to existing database, .net core entity framework code first postgresql, entity framework code first example, entity framework code first connection string, asp net web forms entity framework code first, wpf entity framework code first

Tentang Majikan:
( 9 ulasan ) Bloomfield, United States

ID Projek: #21868621

Dianugerahkan kepada:

FtcITGuys

Hi, I have experience with EF code first migrations. I might be able to help you. Thanks.

$30 USD dalam sehari
(7 Ulasan)
4.1

17 pekerja bebas membida secara purata $143 untuk pekerjaan ini

ppgjsc

Hi I read the project description with interest. I strongly believe I am the proper candidate. I fit all the requirements you mentioned, including entity framework Please check my profile and past reviews. Let us dis Lagi

$140 USD dalam 2 hari
(25 Ulasan)
7.3
NewFuture338

Hello! How are you? I am full-time Desktop App Developer. I have rich experience in Mac-swift, objective-c, java, Windows - Java, C, C++ and C#(winform, wpf, asp.net, asp.net core, xamarin). Please check this link Lagi

$140 USD dalam 7 hari
(28 Ulasan)
6.1
KOKTech

Hello, How are you? I am a senior full stack developer who has rich experiences with entity framework code first development. I read your requirements and I am really interested in your project. I want to discuss the p Lagi

$140 USD dalam 7 hari
(15 Ulasan)
5.9
IjazSe

Dear Sir/Madam, Hop you are doing great!. I am Entity framework code first expert and can surely assist you with my service in fixing the bug right now via ANY DESK. Looking forward for your positive response. Best Lagi

$100 USD dalam sehari
(28 Ulasan)
5.5
hardikshah83

I will troubleshoot the issue, can start immediately. Programmer with more than 10 years of development experience here. I have handled production applications with various technologies like .NET, PHP, Classic ASP and Lagi

$100 USD dalam 3 hari
(20 Ulasan)
5.0
JinTai

I've checked your project requirement and understood whole work scale. Familiar interface and simple algorithm encourage your work. Languages: Objective C , Swift , PHP, Java, SQL, HTML, CSS, JavaScript, C, C++, C#,Py Lagi

$140 USD dalam 7 hari
(1 Ulasan)
3.4
AlexeyKala

⭐ .Net expert here using Entity Framework⭐ I have read your description carefully and very interesting for your project. I am sure I can give you perfect results on time and I can keep good communication with you ev Lagi

$140 USD dalam 7 hari
(1 Ulasan)
2.2
superdev1888

Hello Did you use oracle???????? I read your description carefully. I am a software engineer and have done many desktop applications. Expert in JAVA / C/C++ / C# / .NET / Python / VB. And all the projects will be de Lagi

$140 USD dalam 2 hari
(1 Ulasan)
2.4
Artemrodin1987

Hello client!!! I have just read in your requires carefully and enjoy working with ones like that. I can complete your tasks perfectly in short time because I'm an excellent software engineer that have powerful techniq Lagi

$200 USD dalam 7 hari
(2 Ulasan)
1.8
JennyHazard

Hello, Previously, adding migrations and updating the database worked well, but after adding any c# class, you get the error message "Sequence contains more than one element." I think that's why there would be error ab Lagi

$120 USD dalam 3 hari
(1 Ulasan)
1.3
mihail99999

*****_ Hello Robert H., _***** How are you ? I have read your detail very carefully and understood what you want. I have developed a lot of project like your project, so i have rich experience and so i can complete you Lagi

$110 USD dalam 2 hari
(0 Ulasan)
0.0
CCampbellGLA

I eat this kind of debugging for breakfast :) I will need access to the code, obviously (either access to your source control or a zip file of the project). Very quick turnaround, or no charge.

$140 USD dalam sehari
(0 Ulasan)
0.0
jacksmithmnb

Let me figure out what is wrong and fix it

$200 USD dalam 2 hari
(0 Ulasan)
0.0
Dito24

Hello, How are you? I have 8+ years of experience in C#/C++/JAVA programming. I have read your project description fully. I can understand and finish it wonderfully . I guarantee high project development and qualit Lagi

$200 USD dalam 2 hari
(0 Ulasan)
0.0
sanwalz

That just requires excellent analytical and problem solving skills along with technical 1s. Think got them all. Lets give it a try. Regards

$250 USD dalam 7 hari
(0 Ulasan)
0.0
vukstudio

Dear we will do this task for you in very low cost because we are very experts in this C#. We will do it in couples of minutes. Feel free to contact us. Thanks. Just allow me to help you in code through team viewer Lagi

$140 USD dalam 7 hari
(0 Ulasan)
0.0