SQLite 显示 "Insufficient Parameters supplied to the command" 尽管有足够的参数

Question

我有以下 SQLite table。

CREATE TABLE "Ingredient_Detailed" (
    "DETAILED_INGREDIENT_ID"    TEXT,
    "INGREDIENT_CODE"   INTEGER NOT NULL,
    "BRAND" TEXT NOT NULL,
    "INGREDIENT_SOURCE" TEXT NOT NULL,
    "UNIT_PRICE"    REAL NOT NULL DEFAULT 0,
    "AMOUNT_IN_UNIT"    REAL NOT NULL DEFAULT 0,
    "MINIMUM_PRICE_PER_UNIT"    REAL NOT NULL DEFAULT 0,
    "QUALITY"   INTEGER NOT NULL DEFAULT 1,
    "UNITS_AVAILABLE"   INTEGER NOT NULL DEFAULT 0,
    FOREIGN KEY("INGREDIENT_CODE") REFERENCES "Ingredient"("CODE"),
    PRIMARY KEY("DETAILED_INGREDIENT_ID")
)

我有一个 C# 应用程序，我试图使用以下方法将记录插入此 table：

public int SaveDetailedIngredient(DetailedIngredient pDetailedIngredient)
    {
        try
        {
            using (var conn = new SQLiteConnection(GetConnectionString()))
            {
                var saveDetailedIngredientCommand = new SQLiteCommand("INSERT INTO INGREDIENT_DETAILED (DETAILED_INGREDIENT_ID, " +
                    "INGREDIENT_CODE, BRAND, INGREDIENT_SOURCE, UNIT_PRICE, AMOUNT_IN_UNIT, " +
                    "MINIMUM_PRICE_PER_UNIT, QUALITY, UNITS_AVAILABLE) " +
                    "VALUES ($pDetailedIngredientId, $pCode, $pBrand, $pSource, $pUnitPrice, $pAmountInUnit, $pPricePerUnit, $pQuality, $pUnitsAvailable)", conn);
                pDetailedIngredient.DetailedIngredientCode = pDetailedIngredient.Code + "-" + pDetailedIngredient.Brand + "-" + pDetailedIngredient.IngredientSource;
                saveDetailedIngredientCommand.Parameters.AddWithValue("pDetailedIngredientId", pDetailedIngredient.DetailedIngredientCode);
                saveDetailedIngredientCommand.Parameters.AddWithValue("pCode", pDetailedIngredient.Code);
                saveDetailedIngredientCommand.Parameters.AddWithValue("pBrand", pDetailedIngredient.Brand.Trim().ToUpper());
                saveDetailedIngredientCommand.Parameters.AddWithValue("pSource", pDetailedIngredient.IngredientSource.Trim().ToUpper());
                saveDetailedIngredientCommand.Parameters.AddWithValue("pUnitPrice,", pDetailedIngredient.UnitPrice);
                saveDetailedIngredientCommand.Parameters.AddWithValue("pAmountInUnit", pDetailedIngredient.AmountInUnit);
                saveDetailedIngredientCommand.Parameters.AddWithValue("pPricePerUnit", pDetailedIngredient.MinimumUnitPrice);
                saveDetailedIngredientCommand.Parameters.AddWithValue("pQuality", pDetailedIngredient.Quality);
                saveDetailedIngredientCommand.Parameters.AddWithValue("pUnitsAvailable", pDetailedIngredient.UnitsAvailable);

                conn.Open();
                return saveDetailedIngredientCommand.ExecuteNonQuery();

            }
        }
        catch (SQLiteException sqlEx)
        {

            Console.WriteLine(sqlEx.Message);
            Console.WriteLine(sqlEx.ErrorCode);
            throw sqlEx;
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            throw ex;
        }
    }

尽管指示了 9 个字段并提供了 9 个参数，SQLite 还是抛出了一个异常，提示“未知错误：向命令提供的参数不足”。

我复制并粘贴了参数名称以确保其中没有拼写错误，但它仍然会引发错误。

我在方法执行期间调试了应用程序，提供的 pDetailedIngredient 分配了所有必要的属性值，我可以看到命令中的每个参数都被正确分配。

我还有其他几种向其他 table 插入数据的方法，都遵循相同的结构，所以我怀疑这与我的方法的编写方式有关。

我是不是漏掉了什么？感觉这不是正确的错误。

Answer 1

老实说，我希望我能很好地回答“为什么”会发生这种情况。我只能假设“AddWithValue”正在做我不知道的事情。然而，经过一些来回我会请你试试这个，看看它是否对你有用。

就是我改的是添加如下所示的参数。这始终适用于一些测试，并且仅在重复 id 时才按预期失败。请让我知道这是否对我有帮助，因为从表面上看，您的代码对我来说看起来不错。

saveDetailedIngredientCommand.Parameters.Add("pDetailedIngredientId", DbType.String).Value = pDetailedIngredient.DetailedIngredientCode;
saveDetailedIngredientCommand.Parameters.Add("pCode", DbType.Int32).Value = pDetailedIngredient.Code;
saveDetailedIngredientCommand.Parameters.Add("pBrand", DbType.String).Value = pDetailedIngredient.Brand.Trim().ToUpper();
saveDetailedIngredientCommand.Parameters.Add("pSource", DbType.String).Value = pDetailedIngredient.IngredientSource.Trim().ToUpper();
saveDetailedIngredientCommand.Parameters.Add("pUnitPrice", DbType.Decimal).Value = pDetailedIngredient.UnitPrice;
saveDetailedIngredientCommand.Parameters.Add("pAmountInUnit", DbType.Decimal).Value = pDetailedIngredient.AmountInUnit;
saveDetailedIngredientCommand.Parameters.Add("pPricePerUnit", DbType.Decimal).Value = pDetailedIngredient.MinimumUnitPrice;
saveDetailedIngredientCommand.Parameters.Add("pQuality", DbType.Int32).Value = pDetailedIngredient.Quality;
saveDetailedIngredientCommand.Parameters.Add("pUnitsAvailable", DbType.Int32).Value = pDetailedIngredient.UnitsAvailable;

如果这对您不起作用，请告诉我，我会删除它。

SQLite 显示 "Insufficient Parameters supplied to the command" 尽管有足够的参数

SQLite showing "Insufficient Parameters supplied to the command" despite having enough parameters

c#

sql

sqlite

prepared-statement