I am connecting to a compact SQL database server through a WCF service and keep getting the following except on the Command.ExecuteNonQuery(). I have tried fixing this but just don't know what's wrong.
The exception:
An exception of type 'System.Data.SqlServerCe.SqlCeException' occurred in System.Data.SqlServerCe.dll but was not handled in user code
The code:
//The connectionString can be found in the properties table of the database
string connString = "Data Source=C:\\Users\\User\\documents\\visual studio 2012\\Projects\\ADO_LINQ\\ADO_LINQ\\App_Data\\MyDatabase.sdf;Persist Security Info = False";
SqlCeConnection myConnection = new SqlCeConnection(connString);
myConnection.Open();
// Create the query
string myQuery = "INSERT INTO Player " +
" VALUES (" + registrationID + "," +
firstName + ", " +
lastName + ", " +
phoneNumber + ", " +
address + ", " +
dateOfBirth + ");";
//Initialuze the command
SqlCeCommand myCommand = new SqlCeCommand(myQuery, myConnection);
//Run the command
myCommand.ExecuteNonQuery();
//Close the connection
myConnection.Close();
You are missing Single quotes around your string data types, Assuming only registrationID is Integer data type and all other columns are String data type , your query should look something like ......
// Create the query
String myQuery = "INSERT INTO Player " +
" VALUES (" + registrationID + ", '"+ firstName +"' , '"+lastName+"' , '"+phoneNumber+ "', '"+ address +"', '"+dateOfBirth+"' );";
A better and safer option would be to use Parametrised query. Something like this.....
String connString = @"Data Source=C:\Users\User\documents\visual studio 2012\Projects\ADO_LINQ\ADO_LINQ\App_Data\MyDatabase.sdf;Persist Security Info = False";
using(SqlCeConnection myConnection = new SqlCeConnection(connString))
{
// Create the query
String myQuery = "INSERT INTO Player " +
" VALUES (@registrationID , @firstName , @lastName , @phoneNumber, @address , @dateOfBirth );";
//Initialuze the command
SqlCeCommand myCommand = new SqlCeCommand(myQuery, myConnection);
// Add parameters
myCommand.Parameters.AddWithValue("@registrationID" ,registrationID);
myCommand.Parameters.AddWithValue("@firstName" , firstName);
myCommand.Parameters.AddWithValue("@lastName" , lastName);
myCommand.Parameters.AddWithValue("@phoneNumber" , phoneNumber);
myCommand.Parameters.AddWithValue("@address" , address);
myCommand.Parameters.AddWithValue("@dateOfBirth" , dateOfBirth);
//Open Connection
myConnection.Open();
//Run the command
myCommand.ExecuteNonQuery();
}
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