Solved

C# Execute Query

Posted on 2009-05-02
3
5,400 Views
Last Modified: 2012-05-06
I am writing the code below to change passwords on instances of SQL Server. My first attempt, I tried to connect to the default instance by passing the computer name into the connection string:

SqlConnection conn = new SqlConnection("Data Source=" + computerName + ";Initial Catalog=master;User Id=sa;Password=;");.

However, I had an error during compile. Now I am trying by specifying localhost, but getting an "InvalidOperationException". Can someone look at my code and see what I am doing wrong?

-- PS The sa password is blank and the user names exist on the server.
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Text;
using Microsoft.Win32;
 
namespace RegistryTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] userNames = new string[] { "John", "Michael" };
 
            string computerName = System.Environment.MachineName;
            string password = "password";
 
            //SqlConnection conn = new SqlConnection("Data Source=" + computerName + ";Initial Catalog=master;User Id=sa;Password=;");
            SqlConnection conn = new SqlConnection("Data Source=localhost;Initial Catalog=master;User Id=sa;Password=;");
 
            foreach (string userName in userNames)
            {
                SqlCommand cmd = new SqlCommand("ALTER LOGIN [" + userName + "] WITH PASSWORD=N'" + password + "', conn");
                conn.Open();
                cmd.ExecuteNonQuery();
                conn.Close();
            }
 
            Console.WriteLine("FIN");
        }
    }
}

Open in new window

0
Comment
Question by:computerstreber
  • 2
3 Comments
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 24288915
this line is wrong:

                SqlCommand cmd = new SqlCommand("ALTER LOGIN [" + userName + "] WITH PASSWORD=N'" + password + "', conn");
                conn.Open();


must be:

                SqlCommand cmd = new SqlCommand("ALTER LOGIN [" + userName + "] WITH PASSWORD=N'" + password + "' ", conn);
                conn.Open();
0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 24288916
explanation: in your code, the ",conn" was part of the connection string, instead of specifying the second parameter for the new SqlCommand,..
0
 
LVL 3

Author Closing Comment

by:computerstreber
ID: 31577291
Awesome... that worked beautifully....
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is for Object-Oriented Programming (OOP) beginners. An Interface contains declarations of events, indexers, methods and/or properties. Any class which implements the Interface should provide the concrete implementation for each Inter…
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question