How can check username and password matches the database values in C#?

How can check username and password matches the database values in C#?

  1. string strConn = “Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|userdatabase.mdb” ;
  2. OleDbConnection cn = new OleDbConnection(strConn);
  3. try {
  4. cn.Open();
  5. OleDbCommand cm = new OleDbCommand( “SELECT COUNT(*) FROM users WHERE username=? AND password=?;” , cn);
  6. cm.Parameters.AddWithValue( “?” ,

How do I code a login form in C#?

Login Form With SQL in C#

  1. Open Visual Studio and create a new Windows Forms project.
  2. Make a simple form having the 2 text fields username and password and a login button.
  3. Now go to the menu bar, select the view option and there you can see “Server Explorer”.
  4. Now add your connection.

What database should I use with C#?

Since you are asking this question, the answer is SQLite. If you are asking this question, you are not already in an environment where you have a database server.

How many ways can connect to database in C#?

There is only ONE way to connect to a database .

How do I find my username and password in C#?

Open(); string checkUser = “SELECT * FROM Members where Username= ‘” + TextBoxSignUser. Text + “‘ and Password= ‘” + TextBoxSignPass. Text + “‘”; SqlCommand cmd = new SqlCommand(checkUser, con); cmd. ExecuteNonQuery(); con.

How do I find my username in C#?

MessageBox. Show(Environment. UserName); put this in your window_loaded event, and run it using RunAs…. This returns Domain\Username .

How do I create a login page for Windows form?

How To Create Login Form In Windows Application Using C#

  1. First create the table and insert user login credentials. Query for creating the table. CREATE TABLE [dbo].[UserLogins](
  2. Create a Windows form application, using label, textbox and button from Toolbox .
  3. Step 3 – on click Login button it will go in . cs file.

Is C# good for database?

NET and C# offer object-oriented capabilities such as encapsulation, inheritance, and polymorphism. You can easily organize related code into classes and namespaces, which means that you can more easily organize and maintain your code investments when you are working with large amounts of code.

How do I query a database in C#?

SqlCommand in C# allow the user to query and send the commands to the database. SQL command is specified by the SQL connection object. Two methods are used, ExecuteReader method for results of query and ExecuteNonQuery for insert, Update, and delete commands. It is the method that is best for the different commands.

How can I know my user ID and Password in asp net?

  1. create PROCEDURE CheckUser.
  2. (
  3. @username as varchar(50), @password as varchar(50)
  4. )
  5. AS.
  6. SELECT * FROM registrationtab WHERE username = @username AND password = @password.