Parameter Must Be Defined Error Mysql
Contents |
found out a funny thing today. Or maybe not so funny when I think about it… The order page on one of my sites have mysql allow user variables=true not been working since early November, almost 6 months!! As I'm mysql.data.mysqlclient.mysqlexception (0x80004005): parameter '@' must be defined. sure you understand it's not a very busy site, but usually I get a few orders per c# mysql parameter must be defined month so I should have noticed this a long time ago… The site is running on IIS/ASP.NET and MySQL server 5.0.45 using the MySQL .NET Connector and I'm fatal error encountered during command execution mysql c# using a SQL statement like this on the page: START TRANSACTION; INSERT INTO table1 (companyname,street,city,zip) VALUES (‘XS Tech','test','test','12345′); SELECT @id:=id FROM table1 where id = last_insert_id(); INSERT INTO table2 (id,contactname) VALUES (@id,'Max"); COMMIT; This statement was throwing an exception error: "MySql.Data.MySqlClient.MySqlException: Parameter ‘@id' must be defined" Since I could not really remember - ie had not properly
Mysql Declare Variable
documented - what changes I may have done to that page six months ago, it made trouble shooting a bit harder. But to make a long story short(er) - It turns out I had upgraded the MySQL .NET Connector and this was causing the error. The site was using MySql.Data.dll version 5.2.1.0. I tried to upgrade to 6.0.3.0 to no avail. But when downgrading to 5.1.4.0 it started to work just fine again. Finally, I found that this was indeed a change in the .Net Connector. (I'm not sure what version number but starting from 5.2.0 would be my guess) Starting from version 5.2.2 of the Connector you should add the Allow User Variables=True Connection String Setting in order to use User Defined Variables in your SQL statements. Example of Connection String: Database=testdb;Data Source=localhost;User Id=root;Password=hello;Allow User Variables=True 55 Comments (Click here to add your comment!) Craig Fowler Jul 22, 2009 @ 12:01:45 Thanks - just found this through Google and it saved me a hell of a lot o
compatibility, but I was completely wrong in my assumption. Instead I started getting the following error. Fatal error encountered during command execution. at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) at MySql.Data.MySqlClient.MySqlCommand.ExecuteDbDataReader(CommandBehavior behavior) at System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior) at System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet) The problem is that "Fatal error encountered during command execution" was not particularly useful. As it http://blog.tjitjing.com/index.php/2009/05/mysqldatamysqlclientmysqlexception-parameter-id-must-be-defined.html turned out we had accidentally deployed the new MySql.Data.dll to QA and production without noticing that some queries failed with the above message. Then I tried to reproduce the problem on my laptop and could not. My project in Visual Studio 2010 had a reference to v1 of the MySql.Data.dll. Once I figured out there was a different http://justgeeks.blogspot.com/2013/02/mysql-error-message-parameter-must-be.html version that snuck into our development environment and made it to production I figured that was the issue. So, I changed the reference in VS2010, but it seemed to be using the older version still. I'm not sure exactly how and I didn't take the time to figure out why, and only made everything more confusing. In the end, I created a command line app, and added the new version of the MySql.Data.dll to the project and added just the snippet of code that was breaking. Thank goodness I could now reproduce the error on my laptop. Now I looked at the inner exception, and I see what the real error message is: Parameter '@A' must be defined. Okay, now we are getting somewhere. After a bit of searching I figured out that I had to add "Allow User Variables=True" to my connection string (not the SQL, but the connection string in the config file). The solution: Just add Allow User Variables=True to your config file and you can
Reporter: Todd Powers Email Updates: Status: Closed Impact on me: None Category:Connector / NET Severity:S1 https://bugs.mysql.com/bug.php?id=66060 (Critical) Version:6.5.4 OS:Microsoft Windows (Server 2003) Assigned to: Gabriela Martinez Sanchez http://www.codeproject.com/Questions/720041/passing-parameters-to-Mysqldatareader View Add Comment Files Developer Edit Submission View Progress Log Contributions [27 Jul 2012 22:35] Todd Powers Description: .ExecuteNonQuery() returns "Parameter '?' must be defined." error, when attempting to execute the query, "insert into table_name (Field1, Field1) VALUES(?,?)" Exception received: [MySqlException must be (0x80004005): Parameter '?' must be defined.] MySql.Data.MySqlClient.Statement.SerializeParameter(MySqlParameterCollection parameters, MySqlPacket packet, String parmName) +160 MySql.Data.MySqlClient.Statement.InternalBindParameters(String sql, MySqlParameterCollection parameters, MySqlPacket packet) +357 MySql.Data.MySqlClient.Statement.BindParameters() +50 MySql.Data.MySqlClient.PreparableStatement.Execute() +28 MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) +948 How to repeat: 1. Create form with two text boxes and a button (txtField1, txtField2, & btnAdd) 2. Use code below to implement button must be defined handler and SQL interface. 3. Modify connection information and table/field names in provided code, for your environment. C# Button Click handler which excercises the functionality: ============================================================ protected void btnAdd_Click(object sender, EventArgs e) { SQLSystem sql = new SQLSystem(); sql.insertIntoSQL("insert into table_name (Field1, Field2) VALUES(?,?)", txtField1.Text, txtField2.Text); } C# SQLSystem class which duplicates this issue. ===================================================== using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using MySql.Data.MySqlClient; public class SQLSystem { private MySqlConnection conn; public SQLSystem() { try { conn = new MySqlConnection(); conn.ConnectionString = "SERVER=********;" + "PORT=######;" + "DATABASE=*******;" + "UID=********;" + "PASSWORD=*******;" + "Allow User Variables=True;"; } catch (Exception e) { throw new Exception("Error creating instance of SQLSystem.", e); } } public DataSet runQuery(String SQL) { DataSet ds = new DataSet(); try { MySqlDataAdapter data = new MySqlDataAdapter(SQL, conn); conn.Open(); data.Fill(ds); Close(); } catch (Exception e) { throw new Exception("Error running query.", e);
Tips/Tricks Top Articles Beginner Articles Technical Blogs Posting/Update Guidelines Article Help Forum Article Competition Submit an article or tip Post your Blog quick answersQ&A Ask a Question View Unanswered Questions View All Questions... Linux questions C# questions ASP.NET questions SQL questions fabric questions discussionsforums All Message Boards... Application Lifecycle> Running a Business Sales / Marketing Collaboration / Beta Testing Work Issues Design and Architecture ASP.NET JavaScript C / C++ / MFC> ATL / WTL / STL Managed C++/CLI C# Free Tools Objective-C and Swift Database Hardware & Devices> System Admin Hosting and Servers Java .NET Framework Android iOS Mobile SharePoint Silverlight / WPF Visual Basic Web Development Site Bugs / Suggestions Spam and Abuse Watch features Competitions News The Insider Newsletter The Daily Build Newsletter Newsletter archive Surveys Product Showcase Research Library CodeProject Stuff communitylounge Who's Who Most Valuable Professionals The Lounge The Insider News The Weird & The Wonderful The Soapbox Press Releases Non-English Language > General Indian Topics General Chinese Topics help What is 'CodeProject'? General FAQ Ask a Question Bugs and Suggestions Article Help Forum Site Map Advertise with us About our Advertising Employment Opportunities About Us Ask a Question All Questions All Unanswered FAQ passing parameters to Mysqldatareader Rate this: Please Sign up or sign in to vote. See more: C# ASP.NET C#4.0 Hi, SELECT machine_id,operator_id,member_id,card_id,name,paid_amount,due_amount,paid_date,phone_number ,@curRow := @curRow + 1 AS row_number FROM transaction JOIN (SELECT @curRow := 0) r where card_id=@card order by Row_number desc limit 3 ; my query is giving correct results when i run in Mysql workbench. But in program it's giving error Parameter '@curRow' must be defined. 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: MySql.Data.MySqlClient.MySqlException: Parameter '@curRow' must be defined. Source Error: Line 218: MySqlCommand command3 = new MySqlCommand(query3, con); Line 219: command3.Parameters.AddWithValue("@card", cardid); Line 220: using (MySqlDataReader rdr3 = command3.ExecuteReader()) Line 221: { Line 222: if (rdr3.Read()) Sour