Solved

C# Execute Query

Posted on 2009-05-02
3
5,404 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 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

Creating Instructional Tutorials  

For Any Use & On Any Platform

Contextual Guidance at the moment of need helps your employees/users adopt software o& achieve even the most complex tasks instantly. Boost knowledge retention, software adoption & employee engagement with easy solution.

Question has a verified solution.

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

Introduction Although it is an old technology, serial ports are still being used by many hardware manufacturers. If you develop applications in C#, Microsoft .NET framework has SerialPort class to communicate with the serial ports.  I needed to…
This article introduced a TextBox that supports transparent background.   Introduction TextBox is the most widely used control component in GUI design. Most GUI controls do not support transparent background and more or less do not have the…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…
Suggested Courses

739 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