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POFailed to batch insert in Subsonic3 with error "Must declare the scalar variable..."
 

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  1. POFailed to batch insert in Subsonic3 with error "Must declare the scalar variable..."
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    <p>I have met a problem about inserting multiple rows in a batch with Subsonic3. My development environment includes:</p> <pre><code>1. Visual Studio 2010, but use .NET 3.5 2. Active Record Mode in SubSonic 3.0.0.4 3. SQL Server 2005 express 4. Northwind sample database </code></pre> <p>I am using Active Reecord mode to insert mutiple "Product" into table "Products". If I insert the rows one by one, either call "aProduct.Add()" or call "Insert.Execute()" mutiple times (just like the codes below), it works fine.</p> <pre><code> private static Product[] CreateProducts(int count) { Product[] products = new Product[count]; for (int index = 0; index &lt; products.Length; ++index) { products[index] = new Product { ProductName = string.Format("cheka-test-{0}", index.ToString()), Discontinued = (index % 2 == 0), }; } return products; } private static void SucceedByMultiExecuteInsert() { Product[] products = CreateProducts(2); // -------------------------------- prepare batch NorthwindDB db = new NorthwindDB(); var inserts = from prod in products select db.Insert.Into&lt;Product&gt;(x =&gt; x.ProductName, x =&gt; x.Discontinued).Values(prod.ProductName, prod.Discontinued); // -------------------------------- batch insert var selectAll = Product.All(); Console.WriteLine("--- before total rows = {0}", selectAll.Count().ToString()); foreach (Insert insert in inserts) insert.Execute(); Console.WriteLine("+++ after inserting {0} rows, now total rows = {1}", products.Length.ToString(), selectAll.Count().ToString()); } </code></pre> <p>but if I use "BatchQuery" like the codes below, </p> <pre><code> private static void FailByBatchInsert() { Product[] products = CreateProducts(2); // -------------------------------- prepare batch NorthwindDB db = new NorthwindDB(); BatchQuery batchquery = new BatchQuery(db.Provider, db.QueryProvider); var inserts = from prod in products select db.Insert.Into&lt;Product&gt;(x =&gt; x.ProductName, x =&gt; x.Discontinued).Values(prod.ProductName, prod.Discontinued); foreach (Insert insert in inserts) batchquery.Queue(insert); // -------------------------------- batch insert var selectAll = Product.All(); Console.WriteLine("--- before total rows = {0}", selectAll.Count().ToString()); batchquery.Execute(); Console.WriteLine("+++ after inserting {0} rows, now total rows = {1}", products.Length.ToString(), selectAll.Count().ToString()); } </code></pre> <p>then it failed with the exception : " <strong>Unhandled Exception: System.Data.SqlClient.SqlException: Must declare the scalar variable "@ins_ProductName". Must declare the scalar variable "@ins_ProductName".</strong> "</p> <p>Please give me some help to solve this problem. Many thanks.</p>
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