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POObject reference not set to an instance of an object, on SqlConnection.Open(), asp.net
 

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  1. POObject reference not set to an instance of an object, on SqlConnection.Open(), asp.net
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    <p>just learning asp.net with c# and my code is throwing this exception when im trying to open a connection to my database:</p> <pre><code>string connectionString ="DataSource=localhost,3306;Database=somedatabase;Uid=username;Pwd=password;"; using(SqlConnection con = new SqlConnection(connectionString)) { con.Open(); // Exception Thrown Here } </code></pre> <p>Seems relatively simple, so ive really no clue why this is happening.</p> <p>one other thing;</p> <p>all this code is inside tags on the webpage (not really sure if that makes any difference, quite new to asp.net)</p> <p>Cheers!</p> <p>edit-</p> <p>Hey, here is the rest of it. Im going to investigate habib's solution.</p> <p>I am missing some assemblies (mysql), but ill get back when ive tried it out.</p> <pre><code>&lt;%@ Language=C# %&gt; &lt;%@ Import Namespace="System.Data" %&gt; &lt;%@ Import Namespace="System.Data.SqlClient" %&gt; &lt;%@ Import Namespace="MySql" %&gt; &lt;HTML&gt; &lt;script runat="server" language="C#"&gt; void MyButton_OnClick(Object sender, EventArgs e) { } void Page_Load(Object sender, EventArgs e) { // GET THE USERNAME AND PASSWORD FROM THE CLIENT NameValueCollection nvc = Request.Form; string username = nvc["username"]; string password = nvc["password"]; Login(username, password); } void Login(string username, string password) { string connectionString = "Data Source=localhost,3306;Database=something;Uid=somename;Pwd=somepass;"; using(MySqlConnection con = new MySqlConnection(connectionString)) { con.Open(); /* if (con.State != ConnectionState.Open) return; try { SqlDataReader reader = null; SqlCommand command = new SqlCommand("SELECT * FROM accounts WHERE username=@username AND password=@password", con); reader = command.ExecuteReader(); Response.Write(reader[0]); } catch (Exception e) { Response.Write(e.ToString()); } con.Close();*/ } } </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USChronojam
    1. USChronojam
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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    1. This table or related slice is empty.
    1. COIs that really all your code?
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      1. POObject reference not set to an instance of an object, on SqlConnection.Open(), asp.net
      1. USRenan
    2. COCan you post more of your code?
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      1. POObject reference not set to an instance of an object, on SqlConnection.Open(), asp.net
      1. USrenefc3
    3. COI try to create a SqlConnection with this connectionstring and return this error "There is no support for the keyword: 'datasource'."
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      1. POObject reference not set to an instance of an object, on SqlConnection.Open(), asp.net
      1. USrenefc3
 

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