[Devexpress] Create a checkbox in the gridcontrol column header

Key code:

/// <Summary> /// draw checkbox for the column header // </Summary> /// <Param name = "View"> gridview </param> /// <Param name = "checkitem"> repositoryitemcheckedit </param> /// <Param name = "fieldname"> name of the checkbox column to be drawn </param> /// <Param name = "E"> columnheadercustomdraweventargs </param> Public static void drawheadercheckbox (this gridview view, repositoryitemcheckedit checkitem, string fieldname, columnheadercustomdraweventargs E) {/* Description: * Reference: https://www.devexpress.com/Support/Center/Question/Details/Q354489 * In customdrawcolumnheader using * eg: * Private void gvcabchdetail_customdrawcolumnheader (Object sender, devexpress. xtragrid. views. grid. columnheadercustomdraweventargs e) * {* gridview _ view = sender as gridview; * _ view. drawheadercheckbox (checkitem, "check", e); *} */If (E. column! = NULL & E. column. fieldname. equals (fieldname) {e. info. innerelements. clear (); E. painter. drawobject (E. info); drawcheckbox (checkitem, E. graphics, E. bounds, getcheckedcount (view, fieldname) = view. datarowcount); E. handled = true ;}} Private Static void drawcheckbox (checking checkitem, graphics g, rectangle R, bool checked) {checkeditviewinfo _ INFO; checkeditpainter _ painter; controlgraphicsinfoargs _ ARGs; _ INFO = checkitem. createviewinfo () as checkeditviewinfo; _ painter = checkitem. createpainter () as checkeditpainter; _ info. editvalue = checked; _ info. bounds = r; _ info. paintappearance. forecolor = color. black; _ info. calcviewinfo (g); _ ARGs = new controlgraphicsinfoargs (_ INFO, new devexpress. utils. drawing. graphicscache (G), R); _ painter. draw (_ ARGs); _ args. cache. dispose ();} Private Static int getcheckedcount (gridview view, string filedname) {int COUNT = 0; For (INT I = 0; I <view. datarowcount; I ++) {object _ cellvalue = view. getrowcellvalue (I, view. columns [filedname]); If (_ cellvalue = NULL) continue; If (string. isnullorempty (_ cellvalue. tostring (). trim () continue; bool _ checkstatus = false; If (bool. tryparse (_ cellvalue. tostring (), Out _ checkstatus) {If (_ checkstatus) Count ++ ;}} return count ;}

Code usage:

        RepositoryItemCheckEdit CheckItem = new RepositoryItemCheckEdit();        const string gcCheckFieldName = "Checked";        private void gvLampConfig_CustomDrawColumnHeader(object sender, ColumnHeaderCustomDrawEventArgs e)        {            GridView _view = sender as GridView;            _view.DrawHeaderCheckBox(CheckItem, gcCheckFieldName, e);        }

Code effect:

Hope this is helpful!