誤差在SQL參數串不包含定義

Question

我發現了一個錯誤

字符串「不包含一個定義‘參數’和沒有擴展方法‘參數’接受型的第一參數」串'可以找到（您是否缺少使用指令或裝配參考？）

我在哪裏做錯了？

string connectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\Users\\shafiq\\Desktop\\history\\App_Data\\Radiation.mdf;Integrated Security=True;User Instance=True"; 

// Create SQLDataSource. 
SqlDataSource sqlDataSource = new SqlDataSource(); 
sqlDataSource.ID = "SqlDataSource123"; 
this.Page.Controls.Add(sqlDataSource); 

// Bind ConnectionString to SQLDataSource. 
sqlDataSource.ConnectionString = connectionString; 

// Retrieve records with only 5 Columns from Employees table of NorthWind Database. 
sqlDataSource.SelectCommand = "SELECT top 30 [date], [data] FROM [loc1] WHERE (([data] >= '2') AND ([date] >= @startdate) AND ([date] < @enddate)) ORDER BY [data] DESC, [date] DESC"; 
sqlDataSource.SelectCommand.Parameters.AddwithValue("@startdate", startdate); 
sqlDataSource.SelectCommand.Parameters.AddwithValue("@enddate", enddate); 
gridmaxdata.DataSource = sqlDataSource; 
gridmaxdata.DataBind(); 

Answer 1

您正在尋找sqlDataSoruce.SelectParameters.AddWithValue，SelectCommand是string。

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.sqldatasource(v=vs.110).aspx