I am trying with oracle database to Insert and select Hebrew letters
and it not working well.
I tried
Insert into mytable values ('היי');
and the result is ??? and not היי
can someone help me with that
Edit:
Now after i ask from DBA for hebrew option i can write in Hebrew from the sqlplus
but now from my project it still write ???
my code is
OleDbConnection conn = Connect();
conn.Open();
OleDbCommand com = new OleDbCommand("Insert into mytable values ('היי')", conn);
com.ExecuteNonQuery();
and still the result is ???
I can't really test this because I don't know anything about your database (not even your column names), but you should do that command with parameters:
var testString = "היי"; // Do be aware that Visual Studio displays Hebrew text right-to-left, so the actual string is reversed from what you see.
using (OleDbConnection conn = Connect())
{
conn.Open();
using (OleDbCommand com = conn.CreateCommand())
{
// OleDbCommand com = new OleDbCommand("Insert into mytable values ('היי')", conn);
com.CommandText = "Insert into mytable values (?)";
com.Parameters.Add(new OleDbParameter { OleDbType = OleDbType.VarWChar }).Value = testString;
com.ExecuteNonQuery();
}
}
Also, don't forget to dispose your disposables via a using statement.
Relatedly, here is a report that using a parameterized query fixed a similar problem with OracleCommand.
Related
New to C#. Trying to insert values into a Microsoft Access Database using this code:
string value = "It's a nice day"
con.Open();
OleDbCommand cmd = con.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "insert into Table1 values('"+ value + "')";
cmd.ExecuteNonQuery();
con.Close();
But I get the error 'Syntax error (missing operator) in query expression' which I'm going to assume, stems from the apostrophe in the string value. Is there any way around this?
Every time you need to pass values to execute an sql query you should ALWAYS use a parameterized query. As you have experienced, apostrophes mess with the syntax when you concatenate strings.
A parameterized query for your case should be
string value = "It's a nice day"
OleDbCommand cmd = con.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "insert into Table1 values(#value)";
cmd.Parameters.Add("#value", OleDbType.VarWChar).Value = value;
cmd.ExecuteNonQuery();
This will remove the problem with apostrophes, interpretation of the decimal point symbol, date format, but, most important even is not easy to exploit with Access, the Sql Injection ack.
im trying to update the values of columns from the same row in my database.
Here is my code:
if (ModelState.IsValid)
{
using (SqlConnection cn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString))
{
SqlCommand cmd = new SqlCommand();
cmd = cn.CreateCommand();
cmd.CommandText = #"Update Content Set Des='#Des', Sc='#Sc' Where ID_Img=#Id_Img";
cmd.Parameters.Add("#Des", SqlDbType.VarChar);
cmd.Parameters["#Des"].Value = model.Des;
cmd.Parameters.Add("#Sc", SqlDbType.VarChar);
cmd.Parameters["#Sc"].Value = model.Sc;
cmd.Parameters.Add("#Id_Img", SqlDbType.Int);
cmd.Parameters["#Id_Img"].Value = model.Id_Img;
cn.Open();
cmd.ExecuteNonQuery();
cn.Close();
}
}
}
the code works and i get no error, but when i check in my database the values inserted are #Desc and #Sc and not properly the values which comes from form in my view.
I have set a breakpoint and check which values are in the variables all off them have the correct one..
What im doing wrong?
Someone can give me a hand pls?
Don't wrap your parameters in quotes in the actual query. Try this:
cmd.CommandText = #"Update Content Set Des=#Des, Sc=#Sc Where ID_Img=#Id_Img";
The parameters are smart enough to know if they need to be wrapped in quotes or not based on their data types.
I am using MySQL ODBC to insert data into a MySQL table. The first column in the table is an ID that is of type int and auto increments. When I insert the data for the very first row, what should the value be for #ReqID, as shown below? Also, how do I ensure that subsequent executions are auto incrementing for the ID?
Here is the C#:
string conString = WebConfigurationManager.ConnectionStrings["mysql"].ConnectionString;
using (OdbcConnection con = new OdbcConnection(conString))
{
con.Open();
using (OdbcCommand cmd = con.CreateCommand()) {
cmd.CommandText = "INSERT INTO GraphicsRequest (RequestID, Graphic1Desc, Graphic2Desc, Graphic3Desc, ColorChart, Hex1, Hex2, Hex3, Hex4) VALUES (#reqID, #g1d, #g2d, #g3d, #colorChart, #hex1, #hex2, #hex3, #hex4)";
cmd.Parameters.AddWithValue("#reqID", 1);
cmd.Parameters.AddWithValue("#g1d", txtGraphic1Desc.Text);
cmd.Parameters.AddWithValue("#g2d", txtGraphic2Desc.Text);
cmd.Parameters.AddWithValue("#g3d", txtGraphic3Desc.Text);
cmd.Parameters.AddWithValue("#colorChart", ddlColorChart.SelectedValue);
cmd.Parameters.AddWithValue("#hex1", lblColor1.Text);
cmd.Parameters.AddWithValue("#hex2", lblColor2.Text);
cmd.Parameters.AddWithValue("#hex3", lblColor3.Text);
cmd.Parameters.AddWithValue("#hex4", lblColor4.Text);
cmd.ExecuteNonQuery();
}
}
In MySQL you shouldn't supply the ID-field during an INSERT if you want to use the auto incrementing feature of the database itself.
So that would be in your case.
string conString = WebConfigurationManager.ConnectionStrings["mysql"].ConnectionString;
using (OdbcConnection con = new OdbcConnection(conString))
{
con.Open();
using (OdbcCommand cmd = con.CreateCommand()) {
cmd.CommandText = "INSERT INTO GraphicsRequest (Graphic1Desc, Graphic2Desc, Graphic3Desc, ColorChart, Hex1, Hex2, Hex3, Hex4) VALUES (#g1d, #g2d, #g3d, #colorChart, #hex1, #hex2, #hex3, #hex4)";
cmd.Parameters.AddWithValue("#g1d", txtGraphic1Desc.Text);
cmd.Parameters.AddWithValue("#g2d", txtGraphic2Desc.Text);
cmd.Parameters.AddWithValue("#g3d", txtGraphic3Desc.Text);
cmd.Parameters.AddWithValue("#colorChart", ddlColorChart.SelectedValue);
cmd.Parameters.AddWithValue("#hex1", lblColor1.Text);
cmd.Parameters.AddWithValue("#hex2", lblColor2.Text);
cmd.Parameters.AddWithValue("#hex3", lblColor3.Text);
cmd.Parameters.AddWithValue("#hex4", lblColor4.Text);
cmd.ExecuteNonQuery();
}
}
This way the database will INSERT a new row with the next available the ID for you.
Since the other have answered your question, I would suggest that you use the MySQL Connector in your project instead of using OLEDB objects. Download and install the MySQL Connector and then add a reference in your project to the MySQL.Data extension and then add the MySql.Data.MySqlClient using statement to your class and then update your code as follows:
string conString = WebConfigurationManager.ConnectionStrings["mysql"].ConnectionString;
using(MySqlConnection con = new MySqlConnection(connectionString))
{
con.Open();
using(MySqlCommand cmd = new MySqlCommand()
{
cmd.Connection = con; //<-- It looks like you are missing this line in your code
cmd.CommandText = "INSERT INTO GraphicsRequest (Graphic1Desc, Graphic2Desc, Graphic3Desc, ColorChart, Hex1, Hex2, Hex3, Hex4) VALUES (#g1d, #g2d, #g3d, #colorChart, #hex1, #hex2, #hex3, #hex4)";
cmd.Parameters.AddWithValue("#g1d", txtGraphic1Desc.Text);
cmd.Parameters.AddWithValue("#g2d", txtGraphic2Desc.Text);
cmd.Parameters.AddWithValue("#g3d", txtGraphic3Desc.Text);
cmd.Parameters.AddWithValue("#colorChart", ddlColorChart.SelectedValue);
cmd.Parameters.AddWithValue("#hex1", lblColor1.Text);
cmd.Parameters.AddWithValue("#hex2", lblColor2.Text);
cmd.Parameters.AddWithValue("#hex3", lblColor3.Text);
cmd.Parameters.AddWithValue("#hex4", lblColor4.Text);
cmd.ExecuteNonQuery();
}
}
probably this would solve the problem .
strong textcom.ExecuteNonQuery();
long id = com.LastInsertedId;
I have the following code which tries to store e values form 3 textboxes into a MS Access 2007 database.
string ConnString = (#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\\dxs.accdb");
string SqlString = "Insert Into tests( [Nam], [add], [phone]) Values (?,?,?)";
using (OleDbConnection conn = new OleDbConnection(ConnString))
{
using (OleDbCommand cmd = new OleDbCommand(SqlString, conn))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue(#"Nam", textBox1.Text);
cmd.Parameters.AddWithValue(#"add", textBox2.Text);
cmd.Parameters.AddWithValue(#"phone",textBox3.Text);
conn.Open();
cmd.ExecuteNonQuery();
MessageBox.Show("entered");
}
}
But even though the code is correct after entering values nothing is being stored in table.
Shouldn't
cmd.Parameters.AddWithValue(#"Nam", textBox1.Text);
Be:
cmd.Parameters.AddWithValue("#Nam", textBox1.Text);
And so on for the other parameters?
When i had the similar problems, solution was:
If database is part of application it can be copied in a bin folder - and then application work with it. That is why you can`t find your changes in datatables with MS Access client.
Make sure your database exists in output(bin) folder where exists your exe file of project. If not then copy it there. After your have your database file at right place, You will be to see the changes.
Additionally, you also need few changes in your code, you have problem with your parameter.
Change Values (?,?,?) to Values (#Nam,#add,#phone)"; and #"Nam" to "#Nam". See the comments Correction1 and Correction2.
Also no need to use double slash \\ when you are using # at beginning of string
string ConnString=#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\dxs.accdb");
string sql="Insert Into tests([Nam],[add],[phone]) Values (#Nam,#add,#phone)";
// Correction 1: Above line is changed ?,?,? to parameter names (names used by your command)
using (OleDbConnection conn = new OleDbConnection(ConnString))
{
using (OleDbCommand cmd = new OleDbCommand(sql, conn))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("#Nam", textBox1.Text);
cmd.Parameters.AddWithValue("#add", textBox2.Text);
cmd.Parameters.AddWithValue("#phone",textBox3.Text);
// Correction 2: your parameter names are changed #"xyz" to "#xyz"
conn.Open();
cmd.ExecuteNonQuery();
MessageBox.Show("entered");
}
}
your insert statement should be like dis
string SqlString = "Insert Into tests( [Nam], [add], [phone]) Values (#Nam, #add, #phone)";
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("#Nam", textBox1.Text);
cmd.Parameters.AddWithValue("#add", textBox2.Text);
cmd.Parameters.AddWithValue("#phone",textBox3.Text);
try this
When I insert through the OleDbCommand with direct values no problem, it's working fine
OleDbCommand OleCmd1 = new OleDbCommand("Insert into My_Diary (sl_no,reminder) values("+a1+",'CHECK VALUE')", OleCon1);
OleCmd1->ExecuteNonQuery();
But when I like to update through parameter its showing "Syntax Error"....I can't identify my mistake...
string MyConStr = "Provider=VFPOLEDB.1; Data Source='C:\\For_Dbf'; Persist Security Info=False";
InsSavDiaryCmd = "Insert into My_Table1 (sl_no,reminder) values (#sl_no,#reminder) ";
VFPDAp=gcnew OleDbDataAdapter();
VFPDApMy_Table1InsertCommand = gcnew OleDbCommand(InsSavDiaryCmd, OleCon1);
WithInsVar = VFPDAp.InsertCommand.Parameters;
WithInsVar.Add("#sl_no", OleDbType.Integer, 10, "sl_no");
WithInsVar.Add("#reminder", OleDbType.Char, 250, "reminder");
OleCon1.ConnectionString = MyConStr;
OleCon1.Open();
OleDbTransaction Trans=OleCon1.BeginTransaction();
//VFPDAp.DeleteCommand.Transaction = Trans;
//VFPDAp.UpdateCommand.Transaction = Trans;
VFPDAp.InsertCommand.Transaction = Trans;
VFPDAp.Update(MyDataTbl);
Trans.Commit();
OleCon1.Close();
The OleDbCommand doesn't use named parameters. You need to change the insert statement so that it uses questions.
InsSavDiaryCmd = "Insert into My_Table1 (sl_no,reminder) values (?, ?) ";
You need to make sure that you have a parameter for each question mark and make sure that the parameters are inserted in order of their use in the insert statement.
** If you'd like to use name parameters... you can try using VfpClient which is a project that I'm working on to make data access a little nicer from .Net.