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POInserting data into multiple access tables at once in C# (OLEDB)
 

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  1. POInserting data into multiple access tables at once in C# (OLEDB)
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    <p>I have created a class that will manage connection and commands, I named it <strong>DbConfiguration</strong> and it uses a Singleton pattern(using <code>dbc</code> as an object name).</p> <p>My problem is this SQL syntax throws an error when I try to run <code>ExecuteNonQuery()</code></p> <p>Using this connection string:</p> <pre><code>"Provider=Microsoft.ACE.OLEDB.12.0;dbms.accdb;Persist Security Info=False" </code></pre> <p>I executed this first:</p> <pre><code>dbc.SetCommand("INSERT INTO inventory ([CallNumber], [Title], [ImageLocation]) VALUES (@CALLNUMBER, @TITLE, @IMAGELOC);"); dbc.GetCommand().Parameters.Add("@CALLNUMBER", System.Data.OleDb.OleDbType.VarChar, 255); dbc.GetCommand().Parameters.Add("@TITLE", System.Data.OleDb.OleDbType.VarChar, 255); dbc.GetCommand().Parameters.Add("@IMAGELOC", System.Data.OleDb.OleDbType.VarChar, 255); dbc.GetCommand().Parameters["@CALLNUMBER"].Value = txtCallNumber.Text; dbc.GetCommand().Parameters["@TITLE"].Value = txtTitle.Text; dbc.GetCommand().Parameters["@IMAGELOC"].Value = (!moveto.Equals("db_storage\\") ? moveto : "db_storage\\no_img.png"); </code></pre> <p>and followed by:</p> <pre><code>dbc.GetCommand().ExecuteNonQuery(); </code></pre> <p>Next is I executed this code:</p> <pre><code>dbc.SetCommand("INSERT INTO publishing_info ([ID], [Author], [DateTime], [Publisher], [Pages], [ISBN_NO]) " + "VALUES (" + "SELECT([ID] FROM inventory " + "WHERE inventory.CallNumber=@CALLNUMBER AND inventory.Title=@TITLE AND inventory.ImageLocation=@IMAGELOC), " + "@AUTHOR, @DATETIME, @PUBLISHER, @PAGES, @ISBN);"); </code></pre> <p>and also followed by:</p> <pre><code>dbc.GetCommand().ExecuteNonQuery(); </code></pre> <p>Here are the parameters that I have used for your reference:</p> <pre><code>dbc.GetCommand().Parameters.Add("@AUTHOR", System.Data.OleDb.OleDbType.VarChar, 255); dbc.GetCommand().Parameters.Add("@DATETIME", System.Data.OleDb.OleDbType.VarChar, 255); dbc.GetCommand().Parameters.Add("@PUBLISHER", System.Data.OleDb.OleDbType.VarChar, 255); dbc.GetCommand().Parameters.Add("@PAGES", System.Data.OleDb.OleDbType.UnsignedInt, 4); dbc.GetCommand().Parameters.Add("@ISBN", System.Data.OleDb.OleDbType.VarChar, 255); dbc.GetCommand().Parameters["@AUTHOR"].Value = txtAuthor.Text; dbc.GetCommand().Parameters["@DATETIME"].Value = txtYear.Text; dbc.GetCommand().Parameters["@PUBLISHER"].Value = txtPublisher.Text; dbc.GetCommand().Parameters["@PAGES"].Value = uint.Parse(txtPages.Text); dbc.GetCommand().Parameters["@ISBN"].Value = txtISBN.Text; </code></pre> <p>Here is the screenshot of my stack trace(I can't attach it because I only have 1 rep points) <a href="http://i44.tinypic.com/2w49t84.png" rel="nofollow">http://i44.tinypic.com/2w49t84.png</a></p> <p>What should I do to make the syntax work? And also do I need to close the connection first before executing another query?</p> <p><em>Update 1</em></p> <p>I used <code>DMax(\"[ID]\", \"inventory\")</code> to retrieve the last <code>ID</code> but it returns all the fields of <code>inventory</code> and writes it all on the fields that it can be written to, in my C# code but if I write the query on MS Access 2010 it doesn't do what it does on a C# code. What seems to be the problem?</p> <p><em>Update 2</em></p> <p>Problem solved with <code>dbc.GetCommand().Parameters.Clear()</code></p>
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