Connect to the Access database code, as well. Net4.0 version of the report query code

usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingdata1;usingDA1;usingData5;usingDA5;namespaceconnect to the warehouse. admin { Public Partial classDenglu:form { PublicDenglu () {InitializeComponent (); }        Private voidDenglu_load (Objectsender, EventArgs e) {List<zhucehoutaidata5> list =NewZhucehoutaida ().            Select1 (); if(list!=NULL)            {                foreach(Zhucehoutaidata5 xinchlist)                    {COMBOBOX1.ITEMS.ADD (X.nicheng); }            }        }        //Click the login button        Private voidButton1_Click (Objectsender, EventArgs e) {            stringnicheng=Combobox1.text; stringMima=TextBox1.            Text; List<zhucehoutaidata5> list =NewZhucehoutaida ().            Select (Nicheng,mima); if(List! =NULL) {MessageBox.Show ("Login Successful"); Cangkuguanli F=NewCangkuguanli ();  This. Owner =F; F.windowstate= formwindowstate.maximized;//What's the meaning of this sentence?                 This. Visible =false;            F.show (); }            Else{MessageBox.Show ("Logon Failure"); }                        /*if (list = null) {foreach (Zhigongdata x in list) {Comb                    OBOX1.ITEMS.ADD (X.CNO);                COMBOBOX2.ITEMS.ADD (X.zno); }} if (Combobox1.text = = Combobox1.items[0]. ToString () && Combobox2.text = = Combobox2.items[1].                ToString ()) {MessageBox.Show ("login Successful");                Cangkuguanli f = new Cangkuguanli (); This.                Owner = f; F.windowstate = formwindowstate.maximized; What does this sentence mean?                  Visible = false;            F.show ();            } else {MessageBox.Show ("Login Failed"); }*/        }        //When you click to register        Private voidButton2_Click (Objectsender, EventArgs e) {Zhucejiemian F=NewZhucejiemian ();  This. Visible =false;  This. Owner =F;        F.show (); }    }}

. Query code for the Net4.0 report

usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingdata1;usingDA1;usingData5;usingDA5;namespaceconnect to the warehouse. admin { Public Partial classDenglu:form { PublicDenglu () {InitializeComponent (); }        Private voidDenglu_load (Objectsender, EventArgs e) {List<zhucehoutaidata5> list =NewZhucehoutaida ().            Select1 (); if(list!=NULL)            {                foreach(Zhucehoutaidata5 xinchlist)                    {COMBOBOX1.ITEMS.ADD (X.nicheng); }            }        }        //Click the login button        Private voidButton1_Click (Objectsender, EventArgs e) {            stringnicheng=Combobox1.text; stringMima=TextBox1.            Text; List<zhucehoutaidata5> list =NewZhucehoutaida ().            Select (Nicheng,mima); if(List! =NULL) {MessageBox.Show ("Login Successful"); Cangkuguanli F=NewCangkuguanli ();  This. Owner =F; F.windowstate= formwindowstate.maximized;//What's the meaning of this sentence?                 This. Visible =false;            F.show (); }            Else{MessageBox.Show ("Logon Failure"); }                        /*if (list = null) {foreach (Zhigongdata x in list) {Comb                    OBOX1.ITEMS.ADD (X.CNO);                COMBOBOX2.ITEMS.ADD (X.zno); }} if (Combobox1.text = = Combobox1.items[0]. ToString () && Combobox2.text = = Combobox2.items[1].                ToString ()) {MessageBox.Show ("login Successful");                Cangkuguanli f = new Cangkuguanli (); This.                Owner = f; F.windowstate = formwindowstate.maximized; What does this sentence mean?                  Visible = false;            F.show ();            } else {MessageBox.Show ("Login Failed"); }*/        }        //When you click to register        Private voidButton2_Click (Objectsender, EventArgs e) {Zhucejiemian F=NewZhucejiemian ();  This. Visible =false;  This. Owner =F;        F.show (); }    }}

Connect to the Access database code, as well. Net4.0 version of the report query code