Sql connection with asp.net page?

Question

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SQL-Server-2005

, +

I've made a connection in web.config.

HTML

<configuration>
	<appsettings />
  <connectionstrings>
    <add name="connection" connectionstring="server=.\sqlexpress; AttachdbFilename=Database.mdf; integrated security=true; user instance=true" />
    
  </connectionstrings></configuration>

Now how can I make a connection on page and access the database using buttons.

Posted 5-Nov-11 0:54am

Ajvirk

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6 solutions

Solution 4

you can create a class as

C#

 public class Db
{
	public Db()
	{
		//
		// TODO: Add constructor logic here
		//
	}
    public static SqlConnection GetConnection()
    {
        SqlConnection cn = new SqlConnection();
        cn.ConnectionString = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["cnn"].ToString();
        cn.Open();
        return cn;
    }


}

and Use Of Connection

C#

string strid = "select max(id) from FileRequest";
            SqlCommand cmdid = new SqlCommand(strid,Db.GetConnection());
            SqlDataReader drid = cmdid.ExecuteReader();
            if (drid.Read())
            {
                id = Int32.Parse(drid[0].ToString());
            }
cmdid.Connection.Close();

Posted 5-Nov-11 1:02am

uspatel

Solution 5

You can connect to database through following code.

C#

string strCon=ConfigurationManager.ConnectionStrings["connection"].ToString();

SqlConnection con =  new SqlConnection(strCon);

strCon.open();

Posted 5-Nov-11 1:10am

purnananda behera

Updated 5-Nov-11 1:48am

v2

Solution 6

you can call the connection string inside class file and call it in page like:-

in class file write a function

C#

public static string strcon = ConfigurationManager.ConnectionStrings["myConn"].ConnectionString.ToString();

public static SqlConnection OpenConnection()
       {
           try
           {
               SqlConnection cn = new SqlConnection(strcon);
               if (cn.State == ConnectionState.Closed)
               {
                   cn.Open();
               }
               return cn;

           }
           catch (Exception ex)
           {
    
               throw new Exception(ex.Message);


           }
       }

just create object of this class and call this method you will make a connection

Posted 5-Nov-11 2:33am

JBSAHU

Updated 5-Nov-11 2:37am

v2

Solution 7

You can connect to database through following code.

C#

string strCon=ConfigurationManager.ConnectionStrings["connection"].ToString();

SqlConnection con =  new SqlConnection(strCon);

strCon.open();

Posted 5-Nov-11 2:47am

purnananda behera

Updated 5-Nov-11 5:12am

v2

Solution 2

you can use configuration manager as:

C#

SqlConnection sqlConn = new SqlConnection(ConfigurationManager.ConnectionStrings["strconnection"].ToString());

Posted 5-Nov-11 0:59am

member60

Updated 5-Nov-11 5:11am

v3

Comments

RaviRanjanKr 5-Nov-11 11:13am

[Edited]Corrected short text word to Normal[/Edited]
Suggestion :- hey Please don't use any kind of text short word like u instead of YOU.

member60 8-Nov-11 5:49am

agreed Ravi.

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P.Salini · Accepted Answer · 2011-11-05T00:59:00

C#

Public void btnsearch_Click(object sender, EventArgs e)
 
         
    {
       SqlConnection con =  new SqlConnection(ConfigurationManager.ConnectionStrings["connection"].ToString());
        SqlCommand cmd = new SqlCommand("Your query", con);
        cmd.Parameters.AddWithValue("@id",Your parameters value if any);
        cmd.CommandType = CommandType.Text;
        DataTable dt = new DataTable();
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        da.Fill(dt);
       
          //data retrieved in dt use it and do further functionality  
        
        
    }

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