how make a Connection property for custome db control?

Question

0.00/5 (No votes)

See more:

I made a component that link in database so should have a Connection property as follow :

C#

private string constr;
private SqlConnection con;
...
...
[RefreshProperties(RefreshProperties.All),
DefaultValue(""),
Editor("Microsoft.VSDesigner.Data.SQL.Design.SqlConnectionStringEditor, Microsoft.VSDesigner, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a",
            "System.Drawing.Design.UITypeEditor, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")
    ]

    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
    public string ConnectionString
    {
        get
        {
            return constr;
        }
        set
        {
            constr = value;
            if (!this.DesignMode)
            {
                if (con.State != ConnectionState.Closed)
                    con.Close();
                con.ConnectionString = constr;
                if (!this.DesignMode)
                    con.Open();
            }
        }
 }

now when I use this component every thing is good but when I open connection property combobox in design time only connectionstring that set in server explorer window shown but I need to choose connectin string that set in app.config but this does not show . anybody can tell me how add connection string in app.config in my property combobox . thanks

Posted 29-Jan-13 20:33pm

Mohsen jafari

Add a Solution

Comments

dan!sh 30-Jan-13 3:00am

Where are you setting the ConnectionString property?

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Kishor Deshpande · Answer 1 · 2013-01-29T21:15:00

C#

public static List<string> ReadAppSettings()
{
  List<string> list = new List<string>();
  // Get the AppSettings section.
  ConnectionStringSettingsCollection connections =
               ConfigurationManager.ConnectionStrings;

  if (connections.Count != 0)
  {
    Console.WriteLine();
    Console.WriteLine("Using ConnectionStrings property.");
    Console.WriteLine("Connection strings:");
    // Get the collection elements. 
    foreach (ConnectionStringSettings connection in 
      connections)
    {
      list.Add(connection.Name);
    }
    return list;
  }
   else
  {
    Console.WriteLine();
    Console.WriteLine("No connection string is defined.");
    Console.WriteLine();
  }
}

Use this list as datasource to your combobox.
After selecting a value from combobox, get Value for Selected DB key.