使用事务批量更新 SQLite

问题描述

我在循环中使用 Microsoft.Data.sqlite 将产品添加到 sqlite 数据库时出错。错误：

Must add values for the following parameters: @ItemCode,@ItemCost,@ItemDescription,@LocationId,@ReorderStockLevel,@ReservedStockLevel,@StockLevel,@StockIt,@supplierId

在我的代码中，我尝试遵循 Bulk Insert in Microsoft.Data.Sqlite 和 Bulk insert

中的示例

using (sqliteConnection con = new(DataService.sqliteConnectionString))
{
    con.open();
    using (sqliteTransaction transaction = con.BeginTransaction())
    {
        using (sqliteCommand cmd = con.CreateCommand())
        {
            cmd.CommandText =
                    $"INSERT INTO Products 
                        (
                        ItemCode,ItemCost,ItemDescription,LocationId,ReorderStockLevel,ReservedStockLevel,StockLevel,StockIt,supplierId
                        ) 
                    VALUES 
                        (
                        @ItemCode,@supplierId
                        )";

            sqliteParameter itemCodeParam = cmd.CreateParameter();
            itemCodeParam.ParameterName = "$ItemCode";
            cmd.Parameters.Add(itemCodeParam);

            sqliteParameter itemCostParam = cmd.CreateParameter();
            itemCostParam.ParameterName = "$ItemCost";
            cmd.Parameters.Add(itemCostParam);

            sqliteParameter itemDescriptionParam = cmd.CreateParameter();
            itemDescriptionParam.ParameterName = "$ItemDescription";
            cmd.Parameters.Add(itemDescriptionParam);

            sqliteParameter locationIdParam = cmd.CreateParameter();
            locationIdParam.ParameterName = "$LocationId";
            cmd.Parameters.Add(locationIdParam);

            sqliteParameter reorderStockLevelParam = cmd.CreateParameter();
            reorderStockLevelParam.ParameterName = "$ReorderStockLevel";
            cmd.Parameters.Add(reorderStockLevelParam);

            sqliteParameter reservedStockLevelParam = cmd.CreateParameter();
            reservedStockLevelParam.ParameterName = "$ReservedStockLevel";
            cmd.Parameters.Add(reservedStockLevelParam);

            sqliteParameter stockLevelParam = cmd.CreateParameter();
            stockLevelParam.ParameterName = "$StockLevel";
            cmd.Parameters.Add(stockLevelParam);

            sqliteParameter stockItParam = cmd.CreateParameter();
            stockItParam.ParameterName = "$StockIt";
            cmd.Parameters.Add(stockItParam);

            sqliteParameter supplierIdParam = cmd.CreateParameter();
            supplierIdParam.ParameterName = "$supplierId";
            cmd.Parameters.Add(supplierIdParam);

            foreach (Product newItem in newItems)
            {
                itemCodeParam.Value = newItem.ItemCode;
                itemCostParam.Value = newItem.ItemCost;
                itemDescriptionParam.Value = newItem.ItemDescription;
                locationIdParam.Value = newItem.LocationId;
                reorderStockLevelParam.Value = newItem.ReorderStockLevel;
                reservedStockLevelParam.Value = newItem.ReservedStockLevel;
                stockItParam.Value = newItem.StockIt;
                stockLevelParam.Value = newItem.StockLevel;
                supplierIdParam.Value = newItem.supplierId;
                cmd.ExecuteNonQuery();
            }
            cmd.Prepare();
            transaction.Commit();            
        }
    }
}

对 cmd.ExecuteNonQuery() 的第一次调用触发。当为第二次迭代输入 foreach (Product newItem in newItems) 时抛出异常。使用和不使用 cmd.Prepare()

时抛出相同的异常

没有产品输入到数据库中。数据库连接配置正确，产品可以一次进入数据库行。

如何更新交易中的项目列表？

解决方法

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c#c#microsoft.data.sqlite system.data.sqlite