c# - Try/Catch 方法错误 ASP.NET

Question

我正在努力使这项工作。我希望它在插入后检查记录是否存在，但它总是返回错误:第 1 行:'nvarchar' 附近的语法不正确。有人可以指出我的声明有什么问题吗？另外，如果您有更好的try catch方法，请多多赐教。刚刚接触 ASP.NET 编程

提前致谢。

protected void Page_Load(object sender, EventArgs e)
        {
            string connString_LibrarySystem = "Server=DEVSERVER;User ID=sa;Password=Sup3r-Us3r;Database=LibrarySystem";
            string strSQL = "INSERT INTO TblBooks (bookid, booktitle, lastname, firstname, description, categoryid, dateadded, statusid, quantity, isdeleted) VALUES (@bookid, @booktitle, @lastname, @firstname, @description, @categoryid, @dateadded, @statusid, @quantity, @isdeleted)";

            SqlConnection conn = new SqlConnection(connString_LibrarySystem);

            conn.Open();

            SqlCommand cmd = new SqlCommand();

            cmd = new SqlCommand(strSQL, conn);
            cmd.Parameters.AddWithValue("@bookid", Request.Form["bookid"]);
            cmd.Parameters.AddWithValue("@booktitle", Request.Form["booktitle"]);
            cmd.Parameters.AddWithValue("@lastname", Request.Form["lastname"]);
            cmd.Parameters.AddWithValue("@firstname", Request.Form["firstname"]);
            cmd.Parameters.AddWithValue("@description", Request.Form["description"]);
            cmd.Parameters.AddWithValue("@categoryid", Request.Form["categoryid"]);
            cmd.Parameters.AddWithValue("@dateadded", Request.Form["dateadded"]);
            cmd.Parameters.AddWithValue("@statusid", Request.Form["statusid"]);
            cmd.Parameters.AddWithValue("@quantity", Request.Form["quantity"]);
            cmd.Parameters.AddWithValue("@isdeleted", Request.Form["isdeleted"]);

            cmd.ExecuteNonQuery();
            {
                conn.Close();
            }
            statuslabel.Text = "Insert successful";
        }

编辑:刚刚删除了数据类型。

Answer 1

您不必在插入语句中包含数据类型。跳过它们。

尝试

string strSQL = "INSERT INTO TblBooks (bookid, booktitle, lastname, firstname, description, categoryid, dateadded, statusid, quantity, isdeleted) VALUES (@bookid, @booktitle , @lastname, @firstname, @description, @categoryid, @dateadded , @statusid , @quantity, @isdeleted)";