编程中的小知识点（国外英文资料）.docVIP

编程中的小知识点（国外英文资料） Little things in programming hosts C: \ Windows \ System32 \ drivers \ etc A form is loaded and how to make all its controls do not get the cursor: control.tabstop = False In VS2008, the DataFormatString attribute of the DataViews BoundField is formatted into a short date format: DataFormatString = {0: yyyy-m-d}, and the HtmlEncode property is set to False The text box displays the custom date format: Data. Tables [0]. Rows [0]. Tbox_distributedate.text = dt. ToString ( yyyy-m-d ); Linq queries the DataTable: ( C1 = ABC ); or DataRow [] drArr = dt. Select ( ABC like C1 + % , C2 Desc); Assign a DataRow DataRow to a new DataTable The DataTable dtNew = dt. For (int I = 0; I drArr. Length; I + +) { (drArr [I]); } System files: regsvr32.exe for registering DLL files The password entry box for c # WinForm is forbidden to paste and right-click Private void LoginForm_Load (object sender, EventArgs e) { ContextMenu = new ContextMenu (); (txtPassword. KeyPress + = new KeyPressEventHandler (txtPassword_KeyPress); } Void txtPassword_KeyPress (object sender, KeyPressEventArgs e) { If ((int) e. k eyChar = = 22) { E.H andled = true; } } 8.Com boBoxEdit can only choose not to enter ComboboxEdit. Propoties. TextEditStyle = DisableTextEditor 9. SetToStr (Set_Expression) Returns the string that corresponds to the specified set in the multidimensional expression (MDX) format The test of time WreiteTime ( load method! ); Load (); WreiteTime ( loading method is over! ) Public void WreiteTime (string textName) { The try { FileStream fs = new FileStream ( E: \ \ time.txt , filemode.append) StreamWriter writer = new StreamWriter (fs); DateTime = DateTime. Writer. WriteLine (time + . ) + time. Writer. The Dispose (); Fs. The Dispose (); } The catch (Exception ex) { MessageBox. Show (ex. Message); } } / / the file path String dataFileName = ; / / specify the directory information for the file path DirectoryInfo source = new DirectoryInfo (Path. GetDirectoryName (dataFileName