https://download.csdn.net/download/qq_41739364/86339152

CrystalDecisions.Windows.Forms包含了9.0-13.0的dll文件

usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Data.SqlClient;namespace图书管理系统{publicpartialclass登录窗口:Form{//publicstaticstringConnectionString="Server=(local);database=图书管理库;uid=sa;pwd=1234";//sqlserver混合模式//publicstaticstringConnectionString="Server=(local);IntegratedSecurity=SSPI;database=图书管理库";//windows模式publicstringstrSQL;publicSqlConnectionmyConnection;publicSqlCommandBuildersqlCmdBld;publicDataSetds=newDataSet();publicSqlDataAdapterda;publicintnum=0;privateDataTablemyTable;privateDataRowmyRow;publicstaticstringstrUser;publicstaticstringstrPassword;//publicstaticstringstrDepartment;publicstaticboollogin_flag=false;public登录窗口(){InitializeComponent();}privatevoidbutton2_Click(objectsender,EventArgse){Close();}privatevoid登录窗口_Load(objectsender,EventArgse){linkdatabaselink=newlinkdatabase();//实例化myConnection=newSqlConnection(link.connectionstring());//实例化连接strSQL="select*from用户表";da=newSqlDataAdapter(strSQL,myConnection);ds.Clear();da.Fill(ds,"用户表");//////动作myTable=ds.Tables["用户表"];for(inti=0;i＜myTable.Rows.Count;i++){comboBox1.Items.Add(myTable.Rows[i]["用户名"].ToString().Trim());}}privatevoidbutton1_Click(objectsender,EventArgse){linkdatabaselink=newlinkdatabase();//实例化myConnection=newSqlConnection(link.connectionstring());//实例化连接strSQL="sele

c#对并口的读写操作！INPOUT32.DLLusingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Runtime.InteropServices;namespaceIED_Application{publicpartialclassIED:Form{//intled=0x278;[DllImport("inpout32.dll",EntryPoint="Out32")]publicstaticexternvoidOutput(intadress,intvalue);[DllImport("user32.dll",EntryPoint="MessageBoxA")]publicstaticexternvoidMsgBox(inthWnd,stringmsg,stringcaption,inttype);publicIED(){InitializeComponent();}privatevoidIED_Load(objectsender,EventArgse){}privatevoidoutput_Click(objectsender,EventArgse){MsgBox(0,"这里是用DllImport","tiaozhanbei",0x30);IED.Output(888,253);}}}

System.Windows.Forms.DataVisualization.dll3.5版本

DotNetBar+for+Windows+Forms+12.5.0.2支持VS2013以上版本，亲测可用

C#.net实现学生成绩管理系统namespace学生成绩管理系统{partialclassFormlogin{//////必需的设计器变量。
///privateSystem.ComponentModel.IContainercomponents=null;//////清理所有正在使用的资源。
//////如果应释放托管资源，为true；
否则为false。
protectedoverridevoidDispose(booldisposing){if(disposing&&(components!=null)){components.Dispose();}base.Dispose(disposing);}#regionWindows窗体设计器生成的代码//////设计器支持所需的方法-不要///使用代码编辑器修改此方法的内容。
///privatevoidInitializeComponent(){this.labeluser=newSystem.Windows.Forms.Label();this.textBoxuser=newSystem.Windows.Forms.TextBox();this.labelcode=newSystem.Windows.Forms.Label();this.textBoxcode=newSystem.Windows.Forms.TextBox();this.buttonin=newSystem.Windows.Forms.Button();this.buttonout=newSystem.Windows.Forms.Button();this.SuspendLayout();////labeluser//this.labeluser.Font=newSystem.Drawing.Font("宋体",10.5F,System.Drawing.FontStyle.Regular,System.Drawing.GraphicsUnit.Point,((byte)(134)));this.labeluser.Location=newSystem.Drawing.Point(31,50);this.labeluser.Name="labeluser";this.labeluser.Size=newSystem.Drawing.Size(55,26);this.labeluser.TabIndex=0;this.labeluser.Text="用户名";this.labeluser.TextAlign=System.Drawing.ContentAlignment.MiddleCenter;////textBoxuser//this.textBoxuser.Location=newSystem.Drawing.Point(126,55);this.textBoxuser.Name="textBoxuser";this.textBoxuser.Size=newSystem.Drawing.S

LearnGoogleFlutterbyexample.Over65examplemini-apps.ChaptersInclude:ThreeChaptersonDartLanguage.IntroductiontoFlutter.InstallingFlutter.YourfirstFlutterApp.Dependencies&Packages.IntroductiontoWidgets&Composition.StatelessWidgets.StatefulWidgets.BasicMaterialWidgets.Multi-ChildWidgets.Single-ChildWidgets.AppScaffoldingWidgets.OtherWidgets.Builders.Routing&Navigation.Forms.Http,Apis,REST&JSON.FlutterwithHttp,Apis,REST&JSON.State.State&StatefulWidgets.State&InheritedWidgets.State&ScopedModel.State&BLoCswithStreams.LocalPersistence.Mixins.Debugging&PerformanceProfiling.

flask表单本次介绍flask表单的应用与编辑

usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Data.SqlClient;usingSystem.Configuration;namespacePhoneBook{publicpartialclassfrmMain:Form{publicfrmMain(){InitializeComponent();}privatestringstrConn=System.Configuration.ConfigurationManager.AppSettings["ConnectionString"];privatevoidfrmMain_Load(objectsender,EventArgse){LoadGroup();if(trvGroup.Nodes.Count＞0){trvGroup.SelectedNode=trvGroup.Nodes[0];LoadList();}else{lvContact.Clear();}}privatevoidLoadGroup(){try{trvGroup.Nodes.Clear();SqlConnectionconn=newSqlConnection(strConn);SqlCommandcmd=newSqlCommand();cmd.Connection=conn;cmd.CommandText="selectdistinct组别from联系人where用户名='"+tsslUserName.Text+"'";conn.Open();SqlDataReadersdr=cmd.ExecuteReader();while(sdr.Read()){trvGroup.Nodes.Add(sdr[0].ToString());}sdr.Close();conn.Close();}catch{}}privatevoidLoadList(){if(trvGroup.Nodes.Count==0){lvContact.Clear();return;}if(trvGroup.SelectedNode.Index＞=0){stringstrGroup=trvGroup.SelectedNode.Text;try{lvContact.Clear();lvContact.Columns.Add("姓名",100);lvContact.Columns.Add("工作

在日常工作中，钉钉打卡成了我生活中不可或缺的一部分。然而，有时候这个看似简单的任务却给我带来了不少烦恼。 每天早晚，我总是得牢记打开钉钉应用，点击"工作台"，再找到"考勤打卡"进行签到。有时候因为工作忙碌，会忘记打卡，导致考勤异常，影响当月的工作评价。而且，由于我使用的是苹果手机，有时候系统更新后，钉钉的某些功能会出现异常，使得打卡变得更加麻烦。 另外，我的家人使用的是安卓手机，他们也经常抱怨钉钉打卡的繁琐。尤其是对于那些不太熟悉手机操作的长辈来说，每次打卡都是一次挑战。他们总是担心自己会操作失误，导致打卡失败。 为了解决这些烦恼，我开始思考是否可以通过编写一个全自动化脚本来实现钉钉打卡。经过一段时间的摸索和学习，我终于成功编写出了一个适用于苹果和安卓系统的钉钉打卡脚本。