文档介绍：今年大四了,我选的毕业设计是做一个图书馆管理系统。开始的时候遇到了不少问题,后来开始查资料,请教教授。慢慢的就把框架做出来了,之后就是开始做外观,将界面做的美观大方起来。代码全部经过方针,都可以使用。现在论文已经过了,将代码分享给大家,希望大家能少走弯路,但是不要照抄。要自己想,不知道的时候可以看看。:publicpartialclassLoginForm:Form{;publicstaticstringupsw;publicstaticstringuname;publicstaticstringusex;publicstaticstringupart;publicstaticstringuright;publicLoginForm(){ponent();}privatevoidloginbtn_Click(objectsender,EventArgse){if(==""&&==""){("请输入您的用户名和密码!","提示!");return;}try{stringsql;sql="select*='"++"'andupsw='"++"'";OleDbDataReaderdr=(sql);();if(){=;upsw=;uname=dr["uname"].ToString();usex=dr["usex"].ToString();upart=dr["upart"].ToString();uright=dr["uright"].ToString();MainFormaf=newMainForm(this);();;;();}else{("账号或密码错误!","提示!");;;;}}catch(Exception){("数据库无法连接!","警告!");}}privatevoidcancelbtn_Click(objectsender,EventArgse){();}privatevoidLoginForm_Closing(objectsender,FormClosingEventArgse){();}}(图较小,自己可以拉大点)主要代码就不写了,很简单。:publicpartialclassRightSet:Form{publicRightSet(){ponent();}privatevoidRightSet_Load(objectsender,EventArgse){=0;//;Fill();}privatevoidokbtn_Click(objectsender,EventArgse){if(==){("请输入最大借阅图书数量!","提示!");return;}if(==){("请输入最大借阅图书时间!","提示!");return;}if(==){("请输入借书押金金额!","提示!");return;}if(==){("请输入超期罚款金额!","提示!");return;}if(==){("请输入图书遗失罚款倍数!","提示!");return;}ArrayListarr=newArrayList();foreach(TreeNodenodesin{if(){("1");}else{("0");}foreach(){if(){("1");}else{("0");}}}string[]a=newstring[11];for(inti=0;i<;i++){if(arr[i].ToString().Trim()=="1"){a[i]="yes";}else{a[i]="no";}}stringsql=;sql+="select*fromtb_rightwhereuright='"++"'";DataTabledt=(sql);boolb=false;while(!=0){b=true;break;}stringsql1;if(b){sql1="up