Question

我已创建自定义数据注释，以通知用户已输入重复的SKU。数据注释如下：

[Remote("doesSKUExist", "Products", HttpMethod = "POST", ErrorMessage = "SKU already exists. Please enter a different SKU.")]
public string SKU { get; set; }

在ProductsController中，我有以下内容：

[HttpPost]
    public JsonResult doesSKUExist(string Sku)
    {
        string conStr = @"Data Source=cmsapirontech.database.windows.net;Initial Catalog=CMSDatabase;Integrated Security=False;User ID=dwight;Password=Fatboy99!;Connect Timeout=60;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False";
        SqlConnection sqlconn = new SqlConnection(conStr);

        SqlCommand does_SKU_exist = new SqlCommand("SELECT SKU FROM [Product] WHERE([SKU] = @SKU", sqlconn);
        sqlconn.Open();
        does_SKU_exist.Parameters.Add("SKU", SqlDbType.VarChar).Value = Sku;
        var sku = does_SKU_exist.ExecuteScalar();
        return Json(sku == null);
    }

目前，我收到了一行错误：

var sku = does_SKU_exist.ExecuteScalar();

“@SKU附近的语法不正确”任何人都可以帮忙吗？

Answer 1

您忘记在where子句之后关闭)，但实际上在您的情况下不需要(和)：SqlCommand初始化应如下所示：< / p>

SqlCommand does_SKU_exist = new SqlCommand("SELECT SKU FROM [Product] WHERE [SKU] = @SKU", sqlconn);

您还需要在添加参数时进行一些小改动，即：

does_SKU_exist.Parameters.Add("@SKU", SqlDbType.VarChar).Value = Sku;

自定义数据注释语法错误

1 个答案: