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execute sql command in asp.net

I have a problem with executing a sql command to the DB. The command should add a new user to the 'users' table.
But when I run the code, I get this Exception on:
command.ExecuteNonQuery();
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.OleDb.OleDbException: Syntax error in INSERT INTO statement.
this is the code of the page - GetSignIn.cshtml :
#{
string Uname = Request["name"];
string userName = Request["userName"];
string pass = Request["passWord"];
string pic = Request["pic"];
string privacy = Request["privacy"];
if(pic == null)
{
pic = "Shared/defaultPic.jpg";
}
System.Data.OleDb.OleDbConnection connection = new System.Data.OleDb.OleDbConnection();
connection.ConnectionString = #"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Etay\Documents\Visual Studio 2012\WebSites\Josef\Shared\users.mdb";
try
{
System.Data.OleDb.OleDbCommand command = new System.Data.OleDb.OleDbCommand();
command.Connection = connection;
connection.Open();
command.CommandText = "INSERT INTO users (userName,passWord,Uname,pic) VALUES ('" + userName + "', '" + pass + "', '" + Uname + "', '" + pass + "', " + pic + ")";
command.ExecuteNonQuery();
Response.Redirect("../HtmlPage.html");
}
finally
{
connection.Close();
}
}
What should I change in my code? Why is it happening? Where is the syntax error in the INSERT INTO?

Use parameterized queries. Here is your statement rewritten to make use of them.
I replaced your try/finally with a using block although your try/finally was acceptable.
Parameterized queries prevent errors and Sql Injection Attacks. An error could occur in your existing code if I were to submit a tick as a part of my user name or password. In the current form this would result in an exception. This is because the tick character is used to quote strings in sql syntax.
using (System.Data.OleDb.OleDbConnection connection = new System.Data.OleDb.OleDbConnection())
{
connection.ConnectionString = #"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Etay\Documents\Visual Studio 2012\WebSites\Josef\Shared\users.mdb";
using (System.Data.OleDb.OleDbCommand command = new System.Data.OleDb.OleDbCommand())
{
command.Connection = connection;
command.CommandText = "INSERT INTO users (userName,passWord,Uname,pic) VALUES (?,?,?,?)";
command.Parameters.Add(userName);
command.Parameters.Add(pass);
command.Parameters.Add(Uname);
command.Parameters.Add(pic);
connection.Open();
command.ExecuteNonQuery();
}
}
About parameters for an OleDb connection from OleDbCommand.Parameters
Remarks
The OLE DB .NET Provider does not support named parameters for passing parameters to an SQL statement or a stored procedure called by an OleDbCommand when CommandType is set to Text. In this case, the question mark (?) placeholder must be used. For example:
SELECT * FROM Customers WHERE CustomerID = ?
Therefore, the order in which OleDbParameter objects are added to the OleDbParameterCollection must directly correspond to the position of the question mark placeholder for the parameter in the command text.

What should I change in my code?
Change to parameters (that also fixes the problem that you don;t have quotes around the pic value)
Remove the second instance of pass in your values
command.CommandText = "INSERT INTO users (userName,passWord,Uname,pic) VALUES (#userName, #pass, #Uname, #pic)";
command.Parameters.Add("#userName").Value = userName;
.. etc.
It's unclear what the type if pic is - you are passing a string but I can;t tell of the column stores a file path or if you are indending to serialize the file and store it in a pinary field.

You set 4 fields after the "INTO" clause, however you're passing 5 parameters:
"INSERT INTO users (userName,passWord,Uname,pic) VALUES ('" + userName + "', '" + pass + "', '" + Uname + "', '" + pass + "', " + pic + ")";
Just add the fifth field, or remove one parameter from the VALUES part

Please check take a look at your Insert statement, it looks like that you provided password value twice.
The number of query values and the destination fields should be same in an INSERT statement.

You have the wrong number parameters in your insert statement. For clarity, why not use string.Format to keep everything uniform? (Assuming these are all string types)
var rawSql = #"Insert INTO Users (userName,passWord,Uname,pic) VALUES ('{0}','{1}','{2}','{3}')";
command.CommandText = string.Format(rawSql, userName, pass, Uname, pic);
command.ExecuteNonQuery();
However, it also looks like you probably want to include that 5th parameter as well - just extend the format :
var rawSql = #"Insert INTO Users (userName,passWord,Uname,pic, privacy) VALUES ('{0}','{1}','{2}','{3}','{4}')";
command.CommandText = string.Format(rawSql, userName, pass, Uname, pic, privacy);
command.ExecuteNonQuery();

Since most of the answers failed to address the SQL Injection vulnerability, here's an example with parameterized queries. In addition to preventing SQL Injection attacks, it also makes it easier to troubleshoot these types of issues, and you don't need to worry about quoting or not quoting parameters.
System.Data.OleDb.OleDbConnection connection = new System.Data.OleDb.OleDbConnection();
connection.ConnectionString = #"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Etay\Documents\Visual Studio 2012\WebSites\Josef\Shared\users.mdb";
try
{
System.Data.OleDb.OleDbCommand command = new System.Data.OleDb.OleDbCommand();
command.Connection = connection;
connection.Open();
command.CommandText = "INSERT INTO users (userName, passWord, Uname, pic, privacy) VALUES (?, ?, ?, ?, ?)";
command.Parameters.Add(userName);
command.Parameters.Add(pass);
command.Parameters.Add(name);
command.Parameters.Add(pic);
command.Parameters.Add(privacy);
command.ExecuteNonQuery();
Response.Redirect("../HtmlPage.html");
}
finally
{
connection.Close();
}

Tnx 4 the help
It happend to be a problem with the database - you can not apply a INSERT INTO statement where the column name is "password". "password" is a Reserved word
in SQL.
Tnx again,
Etay

How can I get values from database

I tried to get values from access data base with two where clause. This is the error that I got!
"Syntax error (missing operator) in query expression 'unit1<=34 and unit2>=34 where"'.
and this is my code:
OleDbConnection con = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=E:\\Work\\Office\\Electricity_Board_bill_calculator\\gk.accdb;");
con.Open();
OleDbCommand com5 = new OleDbCommand("select id from tblBillConfig where unit1<="
+ contot + " and unit2>=" + contot + " where group=3 ", con);

You have 'where' in 2 places of the SQL string. This is at least one reason for the error.

There are a couple of potential issues:
You can't have 2 where clauses. The second filter needs to be introduced with and`
Group is a reserved keyword, so and needs to be escaped. (This would be [group] in Sql Server. I'm not sure how to do this in MS Access)
You should also look at using parameters to bind variables. This addresses a bunch of issues, such as sql injection, and also improves performance as the parameterization may allow your RDBMS to cache the query plan.
So your query should look something like this:
var com5 = new OleDbCommand("select id from tblBillConfig " +
" where unit1<=? and unit2>= ? and [group]=3 ", con);
command.Parameters.Add("#p1", OleDbType.Integer).Value = 34;
command.Parameters.Add("#p2", OleDbType.Integer).Value = 34;

Syntax error in UPDATE statement OleDb Exception

I check my SQL Statement many times and it seems that my SQL Statement is Error. I don't why it doesn't work. My SQL Statement is correct and It resulted to this OleDBException "Syntax error in UPDATE statement.".
Here is the code
OleDbConnection CN = new OleDbConnection(mysql.CON.ConnectionString);
CN.Open();
cmd1 = new OleDbCommand("Update Mosque Set Name='" + txtNAME.Text + "', No='" + Convert.ToInt32(txtNO.Text) + "', place='" + txtPlace.Text + "', group='" + txtGroup.Text + "', description='" + txtdec.Text + "' where id='" + txtID.Text + "'", CN);
cmd1.ExecuteNonQuery();
CN.Close();
need help please to know what is the error here

I don't know what database are you using, but I am sure that GROUP is a reserved keyword in practically any existant SQL database. This word cannot be used without some kind of delimiter around it. The exact kind of delimiter depend on the database kind. What database are you using?
Said that, please do not use string concatenation to build sql commands, but use always a parameterized query. This will allow you to remove any possibilities of Sql Injection and avoid any syntax error if one or more of your input string contains a single quote somewhere
So, supposing you are using a MS Access Database (In Access also the word NO is a reserved keyword and the delimiters for reserved keywords are the square brakets) you could write something like this
string commandText = "Update Mosque Set Name=?, [No]=?, place=?, " +
"[Group]=?, description=? where id=?"
using(OleDbConnection CN = new OleDbConnection(mysql.CON.ConnectionString))
using(OleDbCommand cmd1 = new OleDbCommand(commandText, CN))
{
CN.Open();
cmd1.Parameters.AddWithValue("#p1",txtNAME.Text);
cmd1.Parameters.AddWithValue("#p2",Convert.ToInt32(txtNO.Text));
cmd1.Parameters.AddWithValue("#p3",txtPlace.Text);
cmd1.Parameters.AddWithValue("#p4",txtGroup.Text);
cmd1.Parameters.AddWithValue("#p5",txtdec.Text);
cmd1.Parameters.AddWithValue("#p6",txtID.Text);
cmd1.ExecuteNonQuery();
}
Instead for MySQL you have to use the backticks around the GROUP keyword
string commandText = "Update Mosque Set Name=?, No=?, place=?, " +
"`Group`=?, description=? where id=?"

Hard to tell without knowing the values of the texboxes, but I suspect that one of them has an apostrophe which is causing an invalid syntax.
I recommend using parameters instead:
cmd1 = new OleDbCommand("Update Mosque Set [Name]=#Name, [No]=#No, [place]=#Place, [group]=#Group, [description]=#Description WHERE id=#ID", CN);
cmd1.Parameters.AddWithValue("#Name",txtNAME.Text);
cmd1.Parameters.AddWithValue("#No",Convert.ToInt32(txtNO.Text));
// etc.

SqlException: Incorrect syntax near the keyword 'AND'

I'm making a management program with C# & SQL Server 2008. I want to search records using Blood Group, District & Club Name wise all at a time. This is what is making prob:
SqlDataAdapter sda = new SqlDataAdapter("SELECT * FROM Table2
WHERE #Blood_Group =" + tsblood.Text + "AND #District =" + tsdist.Text +
"AND Club_Name =" + tscname.Text, Mycon1);
Can anyone tell me what is the correct syntax? Tnx in advance. :)

The correct syntax is to use parametrized queries and absolutely never use string concatenations when building a SQL query:
string query = "SELECT * FROM Table2 WHERE BloodGroup = #BloodGroup AND District = #District AND Club_Name = #ClubName";
using (SqlDataAdapter sda = new SqlDataAdapter(query, Mycon1))
{
sda.SelectCommand.Parameters.AddWithValue("#BloodGroup", tsblood.Text);
sda.SelectCommand.Parameters.AddWithValue("#District", tsdist.Text);
sda.SelectCommand.Parameters.AddWithValue("#ClubName", tscname.Text);
...
}
This way your parameters will be properly encoded and your code not vulnerable to SQL injection attacks. Checkout bobby tables.
Also notice how I have wrapped IDisposable resources such as a SqlDataAdapter into a using statement to ensure that it is properly disposed even in case of an exception and that your program will not be leaking unmanaged handles.

You forgot an AND (and possible an # in front of Club_Name?):
String CRLF = "\r\n";
String sql = String.Format(
"SELECT * FROM Table2" + CRLF+
"WHERE #Blood_Group = {0}" + CRLF+
"AND #District = {1} " + CRLF+
"AND Club_Name = {2}",
SqlUtils.QuotedStr(tsblood.Text),
SqlUtils.QuotedStr(tsdist.Text),
SqlUtils.QuotedStr(tscname.Text));
SqlDataAdapter sda = new SqlDataAdapter(sql, Mycon1);

SQLite not inserting into

I have the following code block
SQLiteConnection cnn = new SQLiteConnection("Data Source=" + getDBPath());
cnn.Open();
SQLiteCommand mycommand = new SQLiteCommand(cnn);
string values = "'" + this.section + "','" + this.exception + "','" + this.dateTimeString + "'";
string sql = #"INSERT INTO Emails_Pending (Section,Message,Date_Time) values (" + values + ")";
mycommand.CommandText = sql;
mycommand.ExecuteNonQuery();
cnn.Close();
When I execute it , nothing happens, no errors are produced, but nothing gets inserted, what am I doing wrong?
Path to DB is correct!
Insert statement works, tried it in a SQLLite GUI (no problems there)
Here is the SQL Snippet:
"INSERT INTO Emails_Pending (Section,Message,Date_Time) values ('Downloading Received Messages','Object reference not set to an instance of an object.','04.12.2009 11:09:49');"

How about adding Commit before Close
mycommand.Transaction.Commit();

You should always use transactions and parameterized statements when using sqlite, else the performance will be very slow.
Read here: Improve INSERT-per-second performance of SQLite?
Your approach is vulnerable to sql injection too. A message in an email can have a piece of sql in its body and your code will execute this piece of sql. You can also run into problems when the message in your string values contains a " or a ' .