How to return user already exist on angular 7 ?

ahmed elbarbary

problem

I work on web api working on asp.net core 2

I check users exist on database

if user i create exist on database then message will show to me

user already exist

public static bool CheckUserName(string username)
{
bool status = false;
// string constr = ConfigurationManager.ConnectionStrings["conString"].ConnectionString;
using (SqlConnection conn = new SqlConnection(SQLDAL.ConnectionString))
{
using (SqlCommand cmd = new SqlCommand("CheckUserAvailability", conn))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@UserName", username.Trim());
conn.Open();
status = Convert.ToBoolean(cmd.ExecuteScalar());
conn.Close();
}
}
return status;
}

so How to create service on angular 7

and how to call it on Onsubmit event

5 Replies

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thank you for reply until now i dont understand what you give me

actually i need to represent get request from boolean function web api

so how to represent it on angular 7

Hi,

Please find below link for your reference,

https://angular.io/tutorial/toh-pt4

https://www.tutorialspoint.com/angular6/angular6_services.htm