Posts

LINQ (Language Integrated Query) - Part 4

Image
This is fourth part of the ‘LINQ’ series posts that I have started from here . And in this post, you will learn how to setup a demo project to explore LINQ queries. I will use my preinstalled ‘Northwind’ database that you can download from here and install it in SQL Server Management Studio.
Post a Comment
Read More »

Monthly Blogging Report: August 2012

Consolidating all blog posts monthly are very refreshing as it gives me chance to go back and see what I did in last month and for readers gives the chance to see what he not followed up.
Post a Comment
Read More »

LINQ (Language Integrated Query) - Part 3

Image
This is third part of the ‘LINQ’ series posts that I have started from here . And in this post, you will learn something on ‘Generic’ like what are generic types, why we need it in LINQ?
Post a Comment
Read More »

15 Most Useful Visual Studio Tips/Tricks by me

Image
1 comment
Read More »

ORA-01034: Oracle Not Available

It is a simple error meaning your database is down. To fix this, follow the steps given below: SQL>connect sys/password as sysdba SQL>startup SQL>exit
Post a Comment
Read More »

SP2-0110: Cannot create save file "afiedt.buf"

Image
Any query/command (single line or multiple line) we execute resides in the buffer temporarily and it is lost when we execute new query/command because new one takes that place. In case we try to edit that query/command which is in the buffer we get an error " SP2-0110: Cannot create save file "afiedt.buf" ". There are many ways to fix this, I'm going to show you three different ways. 1. Always run the SQL Command Line as administrator. Once you start this way, you will not see said error. 2. Sometimes w e get this error message because we don't have write permission on the current directory. Either start sqlplus from a different directory, or change the editfile entry in sqlplus: SQL>set editfile d:/sqledit.sql In above code, you can use any drive for this and any file name. 3. Create sqledit.sql file and save it in bin directory (sometimes this file misses cause this error) of oracle where sqlplus.exe is resides.Then run sq
38 comments
Read More »

LINQ (Language Integrated Query) - Part 2

Image
This is second part of the ‘LINQ’ series posts that I have started from here . And in this post, you will see some quick examples on LINQ title. As I said in previous post, with LINQ you just need to perform three distinct actions: Obtain the Data Source, Create the query and Execute the query, you will notice it in sample programs given below. We will create Console Apps and test various LINQ concepts. I will walk through very simple programs here and in coming part will dig in depth.
2 comments
Read More »

Popular posts from this blog

Migrating database from ASP.NET Identity to ASP.NET Core Identity

Image
As you know ASP.NET Core Identity (table structure) is different from what we had earlier in ASP.NET Identity. Actually the identity system which we have today with .NET Core is very mature and continuously evolved be it ASP.NET Membership, ASP.NET Identity 1, ASP.NET Identity 2 and now ASP.NET Core Identity. Recently I had to migrate few application to ASP.NET Core and similar its identity database. Because the table schema is changed, i had to re-think and create migration script which I would like to share with you today. It is very simple and easy, just three step and I had everything ready: STEP 1 : Change name of existing tables STEP 2 : Create ASP.NET Core Identity tables STEP 3 : Migrate data from old tables (ASP.NET Identity) to new tables (ASP.NET Core Identity) Script:  https://gist.github.com/itorian/c699e8534b392a6c726ec66c48100072 You should also watch my video, where I demoed migration.
Read More »

Customize User's Profile in ASP.NET Identity System

Image
Note: You should read this post instead, I found below walkthrough will not work on ASP.NET Identity 2. I will re-work on this post soon. In this post you will learn how to customize User’s Profile and add some more fields like FirstName, LastName, EmailID etc with ASP.NET Identity System. In my last post I listed some of the great new features introduced with Identity system .
Read More »

Lambda two tables and three tables inner join code samples

In this blog post you will learn inner join using lambda queries. There will be two samples, in first sample you will see how you can join two tables and in second sample you will see how you can extend even further to join three tables and so on. I will sample in-memory data, but the same implementation will work with IQueryable (lazy query) too. Here's the code snippet:- namespace ConsoleApp1 {     class Program     {         static void Main()         {             var table1 = new List<Table1>();             table1.Add( new Table1 { Id = 1, Name = "Name 1" , Address = "Address 1" });             table1.Add( new Table1 { Id = 2, Name = "Name 2" , Address = "Address 2" });             table1.Add( new Table1 { Id = 3, Name = "Name 3" , Address = "Address 3" });             table1.Add( new Table1 { Id = 4, Name = "Name 4" , Address = "Address 4" });   
Read More »