Update Command Exception

HI

i make form to update some data in table

the code:protected void Update_Click(object sender, EventArgs e)

{SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=AinShams;Integrated Security=True");

con.Open();SqlCommand cmd = con.CreateCommand();

int iid = int.Parse(DropDownList1.SelectedValue);string name2 = DropDownList1.SelectedItem.Text;

string des2 = txt_dsc.Text;string loc2 = txt_loc.Text;

int act=-1;if (active_check.Checked == true)

{

act = 1;

}

else

{

act = 0;

}int yearsc = int.Parse(txt_yc.Text);

int pr = -1;if (prep_ck.Checked == true)

{

pr = 1;

}

else

{

pr = 0;

}

cmd.CommandText = "update Faculties set FacultyName=" +name2+ ",FacultyDescription=" + des2 + ",FacultyLocation=" + loc2 + ",FacultyActive='" + act + "',FacultyYearsCount='" + yearsc + "',FacultyIsPrep='" + pr + "' where FacultyId='" + iid + "'";

//cmd.CommandText = "update Faculties set FacultyName=@name,FacultyDescription=@des,FacultyLocation=@loc,FacultyActive=@act,FacultyYearsCount=@years,FacultyIsPrep=@p where FacultyId=@iid";

// cmd.CommandText = "update Faculties set FacultyDescription=" + des2 + " where FacultyId='" + iid + "'";

//cmd.Parameters.AddWithValue(@name, name);

//cmd.Parameters.AddWithValue(@des, des);

//cmd.Parameters.AddWithValue(@loc, loc );

//cmd.Parameters.AddWithValue(@act, act);

//cmd.Parameters.AddWithValue(@years, yearsc);

//cmd.Parameters.AddWithValue(@p , pr);

//cmd.Parameters.AddWithValue(@iid, iid );

cmd.ExecuteNonQuery();

con.Close();

 }

 

but it give mw exception:


Server Error in '/try' Application.


Invalid column name 'sara'.
Invalid column name 'mayada'.
Invalid column name 'mmmmmm'. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Invalid column name 'sara'.
Invalid column name 'mayada'.
Invalid column name 'mmmmmm'.

Source Error:





The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

  <%@ Page Language="C#" Debug="true" %>

or:

2) Add the following section to the configuration file of your application:

<configuration>
   <system.web>
       <compilation debug="true"/>
   </system.web>
</configuration>

Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.
Stack Trace:





[SqlException (0x80131904): Invalid column name 'sara'.
Invalid column name 'mayada'.
Invalid column name 'mmmmmm'.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +180
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +68
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +199
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2411
System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async) +196
System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) +380
System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +115
Manage_Faculties22.Update_Click(Object sender, EventArgs e) +879
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +75
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +97
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4886





Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433

 

when i click the update button this error appear

sara mayada mmmmm the data i enter in the form

what couse this error please?

Thanx in advance