我試圖通過一個簡單的過程將數據插入到我的數據庫中，但是當我單擊我的按鈕時，我不斷返回：'必須聲明標量變量“@categoryid”。我可以補充一點，沒有變量的另一個數據添加工作沒有問題。我在哪里犯了錯誤？插入類：public partial class B_Line{    public B_Line()    {        this.Budget_Scheme = new HashSet<Budget_Scheme>();    }    public int Line_id { get; set; }    public int Category_id { get; set; }    public string Name { get; set; }    public string Comment { get; set; }    public void InsertLine(int categoryID, string name, string comment)    {        using (var connection = Connection.ConnectionFactory.GetOpenConnection())        {            List<B_Line> lines = new List<B_Line>();            lines.Add(new B_Line {Category_id = categoryID, Name = name, Comment = comment});            connection.Execute("dbo.Insert_Line @categoryid, @name, @comment", lines);        }    }}執行按鈕：private void Button1_Click(object sender, EventArgs e){    B_Line lines = new B_Line();    int ID_Kategorii = Int32.Parse(categoryID.Text);    lines.InsertLine(ID_Kategorii, nameLine.Text, commentLine.Text);}存儲過程 MSSQL：ALTER procedure [dbo].[Insert_Lines](@categoryid int, @name nchar(40), @comment nchar(100)) as insert into BCategory (Category_id, Name, Comment) Values (@categoryid, @name, @comment)