using System;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace AIS.Web{ /// <summary> /// 把GridView作為檔案下載,可供Excel開啟 /// </summary> public class DataGridToFile { public DataGridToFile()
Private Sub Command1_Click() Dim szSQL As String Dim conn As New ADODB.Connection Dim rs As ADODB.Recordset conn.ConnectionString = m_conStr conn.CursorLocation = adUseClient conn.Open szSQL = "select * from table1" S
declare @f1 int, @v1 intset @f1=nullset @v1=nullif @f1=@v1 or (@f1 is null and @v1 is null) print '相同' else print '不同'if @f1<>@v1 or (@f1 is null and @v1 is not null) or (@f1 is not null and @v1 is null) print '不同' else print '相同'print '-------
SET NO_BROWSETABLE ON is an undocumented option performed for Remote Data Service (RDS) ActiveX Data Connector (ADC) connections to SQL Server. Enabling this option makes every SELECT statement act as though FOR BROWSE had been appended to the
多態相關的關鍵字:virtual、new、override可以實現多態的內容:類、方法、屬性、索引器父類修飾定義無virtual子類修飾定義無newoverride無newoverride編譯通過通過錯誤通過通過通過子類變數運行子類行為子類行為 子類行為子類行為子類行為父類變數運行父類行為父類行為 父類行為父類行為子類行為總結:1、沒有修飾符與使用new修飾符表現相同。2、沒有被正確使用virtual和override進行修飾,會隨著變數類型的不同而表現不同的行為。test on dotnet2