How to make database connectivity in asp.net? Solved/Closed

Question

Hello,

I am looking for the database connectivity in asp.net with sql server 2005 or NS Access 2007.

Can anyone help me?

Thanks in advance!
System Configuration: Windows XP Microsoft visual studio 2008,C#.

dEVELOPER · Accepted Answer

Hi,

Please add the following code in your aspx.cs page:

Step 1: Add Namspace using System.Data.SqlClient;

Step 2: Make Sql connection.

Write this code to create Sql connection:
SqlConnection con = new SqlConnection("Server=You server name or comp name;Database=Yourdatabasename;Trusted_Connectopn=True");            SqlCommand cmd = new SqlCommand("Write your sql query here eg. select * from Table name");            con.Open();            DataSet ds = new DataSet(cmd,con);            SqlDataAdapter da = new SqlDataAdapter();            da.Fill(ds);            con.Close();

I hope this should work.

Thanks!

yashmaur · Answer

Hi there is al ink by microsoft that I think can help you much on this issue https://www.microsoft.com/en-us/sql-server/sql-server-2019

kishore kunal · Answer

if you want to make connectivity with sql server on the local system.just define the connection string 
sqlconnection con=new sqlconnection("server=. database="specify the datbase in your system",uid=sa;pwd=sa;"); 

add namespace using system.dat.sqlclient; 

happy coding

Krazoo · Answer

System.Data.SqlClient; 
SqlConnection conn = new SqlConnection("Data Source=servername;Initial Catalog=DatabaseName;User ID=sa;password=pwd;Integrated Security=True"); 



Open Connection.
User SqlDataAdapter if

QQNeo · Answer

Use a .UDL object, textual edit to see connection string

Gareth · Answer

Im Having The Same Sort Of Problem With MySql Im Using This Code below And It Keeps Showing Errors On Line 30 If I Can Fix It It May Work For You Too Worth A Shot ?: For A P-Server Call Conquer Online If Your Wondering But I Dont Know If You Can Take Bits Out And Your For Yourself using System; using MySql.Data.MySqlClient; namespace CoEmu_v2_LoginServer.Database { ///

/// Provides MySql resource connections, for multiple connections to a single MySql database. /// This is due to the fact that the server is multi-threaded, so allowing a single connection would /// likely result in errors, or general loss of performance. ///

public static class DatabaseConnection { public const string USER_NAME = "localhost"; public const string PASSWORD = "1234"; public const string SERVER = "127.0.0.1"; public const string DATA_BASE = "conqueremu"; public static MySqlConnection NewConnection() { MySqlConnection C = null; try{ C = new MySqlConnection("Server=" + SERVER + ";Database='" + DATA_BASE + "';Username='" + USER_NAME + "';Password='" + PASSWORD + "'"); C.Open(); } catch(Exception.e) { Console.WriteLine(e.ToString()); return null; } return C; } } }

eliza81 · Answer

Please visit the link below for details

link

santosh · Answer

Hi, following is code for database connectivity in asp.net using C# and and SQL Server.

While creating the database connection, consider the following things in mind.

1) Add the namespace 
         - System.Data
         - System.Data.SqlClient.

2) Create connection object using connection parameters like server name,   database name , user name and password.


3) Create  sqlcommand  object and pass connection object  and  sql query as parameters 

4) Execute the command using ExecuterReader() method of sqlcommand object.
this will return resultset and get it into sqldatareader object.

5) Navigate the resultset.

6) close the connection object as well as command object

Following is the code:

Using System.Data;
Using System.Data.SqlClient;



SqlConnection con = null;
SqlCommand cmd = null;
SqlDataReader rdr ;
try
{
        con = new SqlConnection("Data Source = Server  Name; Initial Catalog =     Database Name; User Name = user name; password = password");
   
        con.Open();
  cmd = new SqlCommand(con,"sql query");
  rdr = cmd.ExecuteReader();
  while(rdr.Read())
  {
           // Operate on fetched data
  } 
}
catch(Exception exp)
{
    MessageBox(exp.Message);
}
finally
{
    if(cmd != null)
        cmd.Close();
    if(con != null)    
       con.Close();
     if(rdr != null)
        rdr.Dispose();
}

samar.kantam · Answer

<%@ Import Namespace="System.Data.OleDb" %>

nancy0123 · Answer

Hi,
please add the following code in you aspx.cs page.

Step 1 : Add Namspace "using System.Data.SqlClient;"

Step 2 : Make Sql connection.

Write this code to create Sql connection.
SqlConnection con = new SqlConnection("Server=You server name or comp name;Database=Yourdatabasename;Trusted_Connectopn= True");
SqlCommand cmd = new SqlCommand("Write your sql query here eg. select * from Table name");
con.Open();
DataSet ds = new DataSet(cmd,con);
SqlDataAdapter da = new SqlDataAdapter();
da.Fill(ds);
con.Close();

i hope this should work

camillus · Answer

I have constructed a form in aspx (form.aspx).  I have constructed datafile in access.   I have imported file into root of my web file. When I view form in browser and fill in fields and press 'transmit' info stays in the form and does not connect with datafile.

Can somebody please help

sandy · Answer

go through the book available in the market the best option for this

thanks

sandeep · Answer

please add the following code in you aspx.cs page.

Step 1 : Add Namspace "using System.Data.SqlClient;"

Step 2 : Make Sql connection.

Write this code to create Sql connection.
SqlConnection con = new SqlConnection("Server=You server name or comp name;Database=Yourdatabasename;Trusted_Connectopn=True");
SqlCommand cmd = new SqlCommand("Write your sql query here eg. select * from Table name");
con.Open();
DataSet ds = new DataSet(cmd,con);
SqlDataAdapter da = new SqlDataAdapter();
da.Fill(ds);
con.Close();

nandhu · Answer

Thanku ya.

mehultank · Answer

try this......

SqlConnection con = new SqlConnection(strcon);
        con.Open();
       ds = db.get_Data("SELECT ID, user_name, password FROM login  WHERE (CAST(user_name AS varbinary(50)) = CAST('" & loginusertxt.Text.ToString().Trim() & "' AS varbinary(50))) AND (CAST(password AS varbinary(50)) = CAST('" & loginpasstxt.Text.ToString().Trim() & "' AS varbinary(50))) AND Deleted = 'False'")
       SqlCommand cmd = new SqlCommand("select id,u_nm,pass from login WHERE (CAST(u_nm As varbinary(50))= CAST ('" + txtunm.Text + "' As varbinary(50)) AND (CAST(pass AS varbinary(50)) = CAST('" + txtpass.Text + "' As varbinary(50)) )  " ,con);
        SqlDataAdapter adpt = new SqlDataAdapter("select id,u_nm,pass from login WHERE (CAST(u_nm As varbinary(50))= CAST ('" + txtunm.Text + "' As varbinary(50)) AND (CAST(pass AS varbinary(50)) = CAST('" + txtpass.Text + "' As varbinary(50)) )  ",con);
        DataSet ds = new DataSet();
        adpt.fill(ds,"login");
        adpt.Fill[ds, "login"];
        adpt.Fill(ds);
        if (ds.Tables[0].Rows.Count > 0) 
        {
            if (ds.Tables[0].Rows[0].ItemArray[1].ToString().Trim() = txtunm.Text.ToString().Trim() && ds.Tables[0].Rows[0].ItemArray[2].ToString().Trim() = txtpass.Text.ToString().Trim())
             {
                 Response.Redirect("index.aspx");
            }
        }

HNSQ90 · Answer

You Can Make Database Connectivity Through two ways : 1- after implementing namespace using System.Data.SqlClient; Create SsqlConnection sqlconnection cnn=new sqlconnection(" type here the connection string of the database"); and after this you can open connection and do operations you want on this connection . 2- You can make your connection is Dynamic through the following processes : 2-1 : open web.config file 2-2 : after tag , delete this tag and write new tag with the same name to show this tage ..... 2-3 : write inside previous tag this line 2-4 : Good , now your connection it is Dynamic And More Secure . 2-5 : To Access To This connection Open The Page.cs Such As Default.cs and write : using System.Data.SqlClient; public SqlConnection cnn = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["connectionString"].ToString()); and do your operation you want without showing your database connection to secure issues . Good Luck . Regards : Hussein Nasser Al-Qadri

How to make database connectivity in asp.net?

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