整理的笔记

it2026-09-01 4

在aspx页面获取值： UserModel user=new UserModel();实例化 user.Address=context["txtAddress"]; 如果前台不需要的字段，但是数据库中有:user.Money=0;------------------加密加密加密加密加密加密加密加密加密加密加密加密加密加密加密加密加密加密加密加密------------------------------

MD5加密放在一个Tool公共类库(别的项目也可以用)里就ok了 public string GetMd5Code(string str) { //MD5是抽象类，System.Security.Cryptograph.MD5 MD5:HashAlgo MD5继承哈希 MD5 md5=MD5.Create(); .制定编码格式--Default byte[] oldStr=system.Text.Encoding.Default.getBytes(str);//将传过来的str进行编码 byte[] md5str=md5.ComputerHash(oldStr); StringBuilder sb=new StringBuilder(); for(int i=0;i<md5str.Lenght;i++) { sb.Append(md5str[i].ToString("x2"));//转换成16(x)进制，2保证加密后的密文长度一样 } return sb.Tostring(); }-----------------------------------------加密Ending----------------------------------------绑定数据++++修改删除++++提示<table width="100%" border="0" cellpadding="0" cellspacing="0" class="list_table"> <tr> <th width="100">序号</th> <th width="100">标题</th> <th width="100">内容</th> <th>关键字</th> <th>描述</th> <th>添加时间</th> <th>操作</th> </tr> <asp:Repeater ID="Repeater12" runat="server" OnItemCommand="Repeater12_ItemCommand"> <ItemTemplate> <tr> <td><%#Eval("ID") %></td> <td><%#Eval("Title") %></td> <td><%#Eval("Cont") %></td> <td><%#Eval("Keys") %></td> <td><%#Eval("Des") %></td> <td><%#Eval("AddTime") %></td> <td> <asp:LinkButton ID="LinkButton1" runat="server" CommandName="Del" CommandArgument='<%#Eval("ID") %>'>删除</asp:LinkButton> <asp:LinkButton ID="LinkButton2" runat="server" CommandName="Update" CommandArgument='<%#Eval("ID") %>'>修改</asp:LinkButton>

<asp:Label ID="Label1" runat="server" Text='<%#Eval("NewID") %>' Visible="false"></asp:Label> <asp:LinkButton ID="LinkButton1" runat="server" CssClass="btn btn82 btn_del" CommandName="del" OnClientClick="return confirm('要删除吗？')">删除</asp:LinkButton>         <asp:Label ID="Label2" runat="server" Text='<%#Eval("NewID") %>' Visible="false"></asp:Label> <asp:LinkButton ID="LinkButton2" runat="server" CommandName="Update" CommandArgument='<%#Eval("NewID")%>'>修改</asp:LinkButton> </td> </tr> </ItemTemplate> </asp:Repeater> </table>

if (e.CommandName == "Del") { //string strid = ((Label)e.Item.FindControl("Label1")).Text; // int Id = Convert.ToInt32(strid); int id = Convert.ToInt32(e.CommandArgument.ToString()); int result = BLL.UserBLL.DelUser(id); if (result > 0) { // Response.Write("你已经删除了该用户"); Page.ClientScript.RegisterClientScriptBlock(GetType(), "", "<script language=javascript>alert('你已经删除了该用户')</script>"); bindUserList(); } }-------------------------------------------------------------------------------------------------------------------------------------------隐藏传递修改的ID <asp:HiddenField ID="hide" runat="server" /> int id = Convert.ToInt32(hide.Value);

修改：：：：：：：：：：：： if (!IsPostBack) { if (Request.QueryString["NewsID"] != null) { hd_id.Value = Request.QueryString["NewsID"].ToString(); int id = Convert.ToInt32(Request.QueryString["NewsID"]); NewsType();//将下拉列表中的值娶过来 GetSingNews(id); } }---------------------------------------------------------------------------------------------------------------弹出框Page.ClientScript.RegisterClientScriptBlock(GetType(), "", "<script language=javascript>alert('请选择图片')</script>");--------------------------------------------------------------------------------------------------------------------------------------------配置数据库文件： <connectionStrings> <add name="str" connectionString="server=.;database=JinKeLi;Integrated Security=True "/> </connectionStrings> <appSettings> <add key="sqlcon" value="server=.;database=JinKeLi;Integrated Security=True"/> </appSettings>

public static string constr = System.Configuration.ConfigurationSettings.AppSettings["sqlcon"];---------------------------------------------------------------------------------------------------------------------------验证码知识：<script> function getVCode() { var vcode = document.getElementById("vcode"); vcode.src = "ValidateCode.ashx?i="+Math.random(); } </script>

<p> 验证码：<input type="text" name="txtvcode" class="txt" /> <img src="ValidateCode.ashx" id="vcode" align="middle" alt="看不清，换一张" οnclick="getVCode()" /><%--后台生成的图片--%> <a href="javascript:getVCode()" class="hyz">换一张</a> </p>----------------------------------------------------------------------------------------------------------------------------------------百度编辑器知识  <script type="text/javascript" src="../../ueditor/ueditor.config.js"></script> <script type="text/javascript" src="../../ueditor/ueditor.all.js"></script> <link rel="stylesheet" href="../../ueditor/themes/default/dialogbase.css" /> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<tr style="width:500px; height:230px;"> <td class="td_right">内容页：</td> <td class="" style="width:150px;height:80px;"> <textarea name="MyEditor" style="width: 500px; height:200px;" id="MyEditor" runat="server" οnblur="setUeditor()" cols="30" rows="10"> </textarea> <script type="text/javascript">  var editor = new baidu.editor.ui.Editor(); editor.render("MyEditor"); function setUeditor() { var myEditor = document.getElementById("MyEditor") myEditor.value = editor.getContent(); } </script> <asp:Button ID="Btn_submit" runat="server" Text="输出editor的值" OnClick="Btn_submit_Click" />  <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </td> </tr>----------------------------------------------------------------------------------------------------------------------------------------------------------------关于新闻类别的传递和修改，接受的方法接受用： DropDownList1.SelectedValue = dt.Rows[0]["NewsType"].ToString();但是先绑定类型源 DropDownList1.SelectedItem.Text = dt.Rows[0]["ProName"].ToString(); 获取值： DropDownList1.Text = DropDownList1.SelectedValue;

DropDownList1.Text = DropDownList1.SelectedValue;添加的时候用-------------------------------------------------------------------------------------------------------------------------从客户端(MyEditor="<p><img src="/uedito...")中检测到有潜在危险的 Request.Form 值。 ValidateRequest="false"------------------------------------------------------------------------------------------------------------------------------------ public string GetImgType(string typeid)//将类型装换成文字 { DataTable dt = database.GetDt("select * from tb_ImgageType where id="+typeid); if (dt != null && dt.Rows.Count > 0) { return dt.Rows[0]["TypeName"].ToString(); } else { return ""; } }------------------------------------------------------------------------------------------------------------------------------将路径转换成图片 <td class="text-l"><img src='<%#Eval("ConfigLogo") %>' /></td>---------------------------------------------------------------------------------------------------------------------------------获取要修改的值： public void GetUser(int id) { DataTable dt= BLL.UserBLL.GetUser(id); if (dt != null && dt.Rows.Count > 0) { username.Text = dt.Rows[0]["UserName"].ToString(); pwd.Text = dt.Rows[0]["UserPwd"].ToString(); repwd.Text = dt.Rows[0]["UserPwd"].ToString(); } }---------------------------------------------------------------------------------- sqlparmeter 防止参数注入的另一种写法： StringBuilder strSql = new StringBuilder(); strSql.Append("select Id,LoginId,LoginPwd,Name,Address,Phone,Mail,UserRoleId,UserStateId,Money from Users "); strSql.Append(" where LoginId=@LoginId"); SqlParameter[] parameters = { new SqlParameter("@LoginId", SqlDbType.NVarChar,50) }; parameters[0].Value = loginid;-----------------------------------------------------------------------------------------------------转换：model.Money=decimal.Parse(row["Money"].ToString());-----------------------------------------------------------------------------------------------------<span style="color:Red"><%=LoginIdMsg %></span>前台 public string LoginIdMsg { get; set; } 后台 LoginIdMsg = loginidmsg; 这样把后台要返回的数据，就可以在前台展示出来--------------------------------------------------------------------------------------------------------记住我： <asp:CheckBox ID="cbAutoLogin" runat="server" />使我保持登录状态 protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { if (Request.Cookies["username"] != null && Request.Cookies["pwd"] != null) { this.username.Text = Request.Cookies["username"].Value; this.pwd.Text = Request.Cookies["pwd"].Value; } } }

protected void Button2_Click(object sender, EventArgs e) { Response.Cookies["username"].Expires = DateTime.Now.AddDays(-1); Response.Cookies["pwd"].Expires=DateTime.Now.AddDays(-1); if (cbAutoLogin.Checked) { Response.Cookies["username"].Expires=DateTime.Now.AddDays(7); Response.Cookies["pwd"].Expires = DateTime.Now.AddDays(7); } Response.Cookies["username"].Value=this.username.Text.Trim(); Response.Cookies["pwd"].Value = this.pwd.Text.Trim(); }-------------------------------------------------------------------------------------------------------- 前台绑定后台的方法1：前台： <ul id="marquee1_1" class="pro-list"> <%foreach(Model.LinkModel linkmodel in linklist) { %> <li><span"><a href="#"><img src=" <%=linkmodel.LinkPicture %>" width="178" height="146" /></a></span><span><a href="#">包膜控释肥试验田</a></span></li> <% } %> </ul> 后台： public List<LinkModel> linklist { set; get; } linklist = LinkBLL.GetLinkList();

前台绑定后台的方法2：前台： <li><a href="<%=linkUrlS0 %>"><img alt="中国农业信息网" src="<%=LinkPicture0 %>"width="141" height="40" /></a></li> <li><a href="<%=LinkURLS1 %>"><img alt="中国农业信息网" src="<%=LinkPicture1 %>" width="141" height="40" /></a></li> 后台： List<LinkModel> list = LinkBLL.GetLinkList(); LinkPicture0 = list[0].LinkPicture; LinkPicture1 = list[1].LinkPicture; linkUrlS0 = list[0].LinkURL; LinkURLS1 = list[1].LinkURL; public string LinkPicture0 { get; set; } public string LinkPicture1 { get; set; }前台绑定后台的方法3： <td class="td-status" title="<%#Eval("ConfigAddress") %>"><%#Eval("ConfigAddress") %></td>----------------------------------------------------------------------------------------------------------------------------------------------------------------------- Session赋值，取值登录的时候用--Session记录住用户名 Session["username"] = name; 赋值 <li>欢迎<%=Session["username"] %></li>

if（Session["name"]==null||Session["name"].Tostring()==""） { reposnse.Redicrt("Login"); } 关于Session记录登录用户的情况：在其他页面程序进行操作时，要判断是否在登录状态，只要在同一个作用域内，就可以引用Session了-----------------------------------------------------------------------------------------------------------------------------------------------------------更多，绑定到new列表中------------------------------------------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------格式化： <%#Convert.ToDateTime(Eval("ID")).toString("YY-MMmm-dd")%> <%# Eval("NewsTitle")%> 截取字符串的方法---------------------------------------------------------------------------

<td class="td-status" title="<%#Eval("ConfigAddress") %>"><%#Eval("ConfigAddress") %></td><td title="<%#Eval("Desc") %>"> <%#SubStr(Eval("Desc").ToString(),1)%> </td> 在前台显示截取多长...... 要ToString() 因为传过来的都是object类型 public string SubStr(string str,int intlen)截取方法 { if (str.Length > intlen) { string str1 = str.Substring(0, intlen) + "...."; return str1; } else { return str; } }------------------------------------------------------------------------------------------------------------------------------------- <p> 下一篇： <asp:Repeater ID="rp_next" runat="server"> <ItemTemplate> <a href="Product-detail.aspx?id=<%#Eval("ProID") %>"><%#Eval("Title") %></a> </ItemTemplate> </asp:Repeater> </p> <p> 上一篇： <asp:Repeater ID="rp_pre" runat="server"> <ItemTemplate> <a href="Product-detail.aspx?id=<%#Eval("ProID") %>"><%#Eval("Title") %></a> </ItemTemplate> </asp:Repeater> </p> if (!IsPostBack) { string s=Request.QueryString["id"].ToString(); DataTable dt_pre = ChiocePro(Convert.ToInt32(s), "pre"); DataTable dt_next = ChiocePro(Convert.ToInt32(s), "next");

rp_pre.DataSource = dt_pre; rp_pre.DataBind();

rp_next.DataSource = dt_next; rp_next.DataBind(); } public static DataTable GetProductInfo(int pid,string str) { string strsql = "";

if (str=="pre") { strsql = " select top 1 ProID,title from Tb_Product where ProID<" + pid + " order by ProID DESC"; } else if(str=="next") { strsql = " select top 1 ProID,title from Tb_Product where ProID>" + pid + " order by ProID Asc"; } SqlConnection conn = new SqlConnection("server=.;database=JinKeLi;Integrated Security=True "); conn.Open(); SqlDataAdapter sda = new SqlDataAdapter(strsql, conn); DataSet ds = new DataSet(); sda.Fill(ds); DataTable dt = new DataTable(); dt = ds.Tables[0]; return dt; }------------------------------------------------------------------------------------------------------绑定+传值1： <%=Convert.ToDateTime(MN.AddTime)%> public NewsModel MN = new NewsModel(); protected void Page_Load(object sender, EventArgs e) { if(!IsPostBack) { string s=Request.QueryString["id"].ToString(); if (s != null) { int id = Convert.ToInt32(s); DataTable dt= GetOneNew(id); MN.AddTime =Convert.ToDateTime( dt.Rows[0]["AddTime"]); }

} }绑定+传值2： <%=ProductList[0].Content %> public List<ProductModel> ProductList { set; get; } protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) {

if (s != null) { int id = Convert.ToInt32(s); ProductList = ListNews(id); } } }---------------------------------------------------------------------------------------------------------------性别： <asp:RadioButton ID="RadioButton1" runat="server" GroupName="sex" Text="男" /> <asp:RadioButton ID="RadioButton2" runat="server" GroupName="sex" Text="女" /> <asp:Button ID="Button4" runat="server" οnclick="Button4_Click" Text="性别" /> protected void Button4_Click(object sender, EventArgs e) { string s=""; if (RadioButton1.Checked) { s = RadioButton1.Text; } if (RadioButton2.Checked) { s = RadioButton2.Text; } Response.Write("<script>alert('你的性别是：" + s + "')</script>"); }------------------------------------------------------------------------------------------------------------------sqlparmeter的另外一种写法：

StringBuilder strSql=new StringBuilder(); strSql.Append("delete from Books "); strSql.Append(" where ISBN=@ISBN and Id=@Id "); SqlParameter[] parameters = { new SqlParameter("@ISBN", SqlDbType.NVarChar,50), new SqlParameter("@Id", SqlDbType.Int,4) }; parameters[0].Value = ISBN; parameters[1].Value = Id;

int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters); if (rows > 0) { return true; } else { return false; }----------------------------------------------------------------------------------------------------------------------

获取用户输入的值string name=context.request["txtName"];string pwd=context.request["txtPwd"];创建模板

string path=context.request["Login.html"];string html=system.IO.File.MapPath(path);string sql="select * from users where name=@name and pwd=@pwd";

SqlParsms[] sps={ new Sqlparams("@name",name), new Sqlparams("@pwd",pwd) } int result=Convert.Into32( sqlhelper.ExectuScalar(sql,sps));

if(result>0){ context.request.write("<script>alert('登陆成功')</script>"); context.requset.Redict.....}else{ context.request.write("<script>alert('登录失败')</script>"); html=html.replace("@txtname",name).replace("$txtpwd","");}-------------------------------------------------------------------------------------------------------------------------if (UserBLL.CheckUsers(mm) <= 0) { MessageBox.Show("用户不存在"); DialogResult qq = MessageBox.Show("确定注册吗", "不", MessageBoxButtons.YesNoCancel); if (qq == DialogResult.Yes) { AddAdmin AAA = new AddAdmin(); AAA.Show(); this.Hide(); } else { txtBoxUser.Text = ""; pwd = txtBoxPwd.Text = ""; } return; }---------------------------------------------------------------------ViewState用法： <form action="Login.ashx" method="post"><table style=" margin:150px auto"><input type="hidden" name="ViewState" value="123" /><tr><td colspan="2" style=" text-align:center"> 登录系统</td></tr><tr><td><label for="username">用户名：</label></td><td><input type="text" name="username" id="username" value="$name"/></td></tr><tr><td><label for="pwd">密码：</label></td><td><input type="text" name="pwd" id="pwd" value="$pwd" /></td></tr><tr><td colspan="2" style=" text-align:center"><input type="submit" value="登陆" id="btn1" /></td></tr></table></form>

string viewstate = context.Request["ViewState"]; bool IsPostBack = !string.IsNullOrEmpty(viewstate); if (!IsPostBack) {} else { if() {} else { context.Response.Write("<script>alert('登陆失败！');</script>"); loginhtml = loginhtml.Replace("$name", name).Replace("$pwd",""); context.Response.Write(loginhtml); } }-------------------------------------------------------------------AccesssKey: <!DOCTYPE html><html><body>

<p><b>注释：</b>请使用Alt + <i>accessKey</i> (或者 Shift + Alt + <i>accessKey</i>) 来访问带有指定快捷键的元素。</p>

</body></html>-------------------------------------------------------------------------------------性别知识点： protected void Button3_Click(object sender, EventArgs e) { string s = ""; if (RadioButton1.Checked) { s = RadioButton1.Text; } if (RadioButton2.Checked) { s = RadioButton2.Text; } Response.Write("<script>alert('你的相别是" + s + "')</script>"); }------------------------------------------------

public void InitDropDownList1()//下拉列表添加数据 {

//仅仅定义了一个方法，InitDropDownList1 //单个填 DropDownList1.Items.Add("141"); DropDownList1.Items.Add("142"); DropDownList1.Items.Add("143");

ListItem item1 = new ListItem("141", "1"); ListItem item2 = new ListItem("141", "1"); ListItem item3 = new ListItem("141", "1"); ListItem item4 = new ListItem("141", "1");

string[] items = { "141", "142", "143", "144" }; DropDownList1.DataSource = items; DropDownList1.DataBind();//绑定数据

//绑定数据库中的某张表 string sql = "select * from Province"; DataSet da = sqlHelper.GetDataSet(sql); DropDownList1.DataSource = da; DropDownList1.DataTextField = "ProvinceName";//获取市区 DropDownList1.DataValueField = "ProvinceID"; DropDownList1.DataBind();

}-----------------------------------------------------------------------------------在线人数以及访问量：

1.在登录成功那里记录下来登录的用户

context.Session["user"]=name;

//修改Application对象的值之前，进行加锁处理，防止别人同时修改 context.Application.Lock();//此方法为application对象加锁，促进访问的同步 context.Application["onLine"] = Convert.ToInt32(context.Application["onLine"]) + 1; //修改Application对象的值之后，进行解锁处理，以供别人修改 context.Application.UnLock();//此方法为application对象解锁 context.Response.Redirect("AddStudent.htm");2.在查看页面写上：

protected void Page_Load(object sender, EventArgs e) { if (Session["user"] == null) { Response.Redirect("Login.ashx"); } Response.Write("邀请"+Session["user"]+"加入,本团已有"+Application["onLine"]+"个团员"+"<br/>"); Response.Write(Session["user"] + "是本团的第" + Application["count"] + "个团员"); }3.在全局变量那里写上：

protected void Application_Start(object sender, EventArgs e) { Application["onLine"] = 0; Application["count"] = 0; }

protected void Session_Start(object sender, EventArgs e) { //修改Application对象的值之前，进行加锁处理，防止别人同时修改 Application.Lock();//此方法为application对象加锁，促进访问的同步 Application["count"] = Convert.ToInt32(Application["count"]) + 1; //修改Application对象的值之后，进行解锁处理，以供别人修改 Application.UnLock();//此方法为application对象解锁 } ...... protected void Session_End(object sender, EventArgs e) { //修改Application对象的值之前，进行加锁处理，防止别人同时修改 Application.Lock();//此方法为application对象加锁，促进访问的同步 Application["onLine"] = Convert.ToInt32(Application["onLine"]) - 1; //修改Application对象的值之后，进行解锁处理，以供别人修改 Application.UnLock();//此方法为application对象解锁 }

转载于:https://www.cnblogs.com/ZkbFighting/p/9613687.html

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