CODEWITHSUNDEEP
c#sql
user3187867
user3187867

Reputation: 61

Error in sql command c#

I am trying insert some data into a database table using sql commands. I keep getting this error:

Must declare the scalar variable "@MC"

Code: 

void CreateModule() {
    Query = "INSERT INTO TblModules (Module_Code, Module_Name, Date,Start_Time, Duration) values ( @MC, @MN, @DATE, @ST, @DURATION)";

    theReader = dc.ExecuteStatement(Query);
    command.Parameters.AddWithValue("@MC", ModuleCodeTxt.Text);
    command.Parameters.AddWithValue("@MN", ModulenameTxt.Text);
    command.Parameters.AddWithValue("@DATE", MyDateTimePicker.Value);
    command.Parameters.AddWithValue("@ST", comboBoxTime.SelectedItem);
    command.Parameters.AddWithValue("@DURATION", comboBoxDuration.SelectedItem);

    MessageBox.Show(" Module Created");
    conn.CloseConnection();
}

Upvotes: 0

Views: 89

Answers (1)

Selman Genç
Selman Genç

Reputation: 101731

You should give value to your parameters before you execute the query

command.CommandText = Query;  // <-- don't forget to set command text 
command.Parameters.AddWithValue("@MC", ModuleCodeTxt.Text);
command.Parameters.AddWithValue("@MN", ModulenameTxt.Text);
command.Parameters.AddWithValue("@DATE", MyDateTimePicker.Value);
command.Parameters.AddWithValue("@ST", comboBoxTime.SelectedItem);
command.Parameters.AddWithValue("@DURATION", comboBoxDuration.SelectedItem);

//execute the query here, maybe you want this?
theReader = command.ExecuteReader();

By the way where is your command ? your Query variable is just a string literal that holds command text.I don't know what is your method doing but I think you should pass your command to your ExecuteStatement and change your method ofcourse.

Upvotes: 7

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