Asp.Net常用代码

1、jquery搜索框效果

$(document).ready(function()    {      
//搜索框   
    $('#keyword').focus(function() {   
        if($(this).val() == '请输入关键词！') {   
            $(this).val("");   
        }   
    });   
    $('#keyword').blur(function(){   
        if($(this).val() == "") {   
            $(this).val('请输入关键词！');   
        }   
    });   
});  

　　2、Asp.Net给绑定后的DropDownList加上自定义内容

  protected void ddlProvince_SelectedIndexChanged(object sender, EventArgs e)
    {
        string cityname = this.ddlProvince.SelectedItem.Value;
        DataSet ds = Tryine.DBUtility.DbHelperSQL.ExecuteDataSet(CommandType.Text, "select * from Cy_UserInfo where u_city='" + cityname + "'");
        if (ds.Tables[0].Rows.Count > 0)
        {
            this.ddlShopID.DataSource = ds;
            this.ddlShopID.DataTextField = "u_companyName";
            this.ddlShopID.DataValueField = "userid";
            this.ddlShopID.DataBind();
            this.ddlShopID.Items.Insert(0, new ListItem("请选择商会", "0"));
        }
    }

　　3、ajax和ashx提交数据

      $.ajax({
                type: "POST",    //页面请求的类型，通常使用POST,那么处理页需要使用Request.Form["参数名称"]来获取页面传递的参数
                url: "http://www.cnblogs.com/WebService/CgAdd.ashx",   //处理页的相对地址
                data: { qy: qyname, cg: cgName,cp:cgphone, zx: zxName },
                contentType: "application/x-www-form-urlencoded; charset=gb2312",
                success: function (msg) {    //这是处理后执行的函数，msg是处理页返回的数据
                    alert(msg);
                    //提交成功后清空文本框
                    $("#QyName").val("");
                    $("#CgName").val("");
                    $("#Cgphone").val("");
                    $("#ZxName").val("");
                }
            });

　　4、Repeater删除数据

      在repeater的某一列放入一个按钮，把按钮的e.CommandName设置为“del”,e.CommandArgument设置你要删除的主键，例如

 <td>
   <asp:LinkButton ID="lbtnDel" runat="server" CommandArgument='<%#Eval("id")%>' CommandName="del">删除</asp:LinkButton>
 </td>

　　然后再rrepeater的ItemCommand事件里写如下代码

  protected void rptEducationalList_ItemCommand(object source, RepeaterCommandEventArgs e)
    {
        if (e.CommandName == "del")
        {
              //删除的主键=e.CommandArgument.tostring();
              //删除的方法;
        }
    }

　　5、遍历dataset

           DataSet ds = xxx.GetList("");

           if(ds == null || ds.Tables.Count <=0 || ds.Tables[0].Rows.Count <= 0) 
           {
             return;
           }
           //循环遍历ds
           foreach(DataRow row in ds.Tables[0].Rows)
           {
               this.xxx.Text = row["列名"].ToString();
               //........
           }

　　6、高光显示关键字

        /// <summary>
        /// 高光显示关键字
        /// </summary>
        /// <param name="PageStr">内容</param>
        /// <param name="keys">关键字</param>
        /// <returns></returns>
        public string p__HighLight(string PageStr, string keys)
        {
            string[] key = keys.Split(new string[] { " " }, StringSplitOptions.None);
            for (int i = 0; i < key.Length; i++)
            {
                PageStr = PageStr.Replace(key[i].Trim(), "<font color=#C60A00>" + key[i].Trim() + "</font>");
            }
            return PageStr;
        }
        /// <summary>
        /// 替换关键字为红色
        /// </summary>
        /// <param name="pain">原始内容</param>
        /// <param name="keyword">关键字，支持多关键字</param>
        public string HighLightKeyWord(string pain, string keys)
        {
            string _pain = pain;
            string[] key = keys.Split(new string[] { " " }, StringSplitOptions.None);
            if (key.Length < 1)
                return _pain;
            for (int i = 0; i < key.Length; i++)
            {
                System.Text.RegularExpressions.MatchCollection m = System.Text.RegularExpressions.Regex.Matches(_pain, key[i].Trim(), System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                //忽略大小写搜索字符串中的关键字
                for (int j = 0; j < m.Count; j++)//循环在匹配的子串前后插东东
                {
                    //j×31为插入html标签使pain字符串增加的长度:
                    _pain = _pain.Insert((m[j].Index + key[i].Trim().Length + j * 31), "</span>");//关键字后插入html标签
                    _pain = _pain.Insert((m[j].Index + j * 31), "<span style=color:red>");//关键字前插入html标签
                }
            }
            return _pain;
        }

　　7、获得Model修改数据

  protected void btnCancel_Click(object sender, EventArgs e)
    {
        string recordNO = Request.QueryString["recordNO"];
        rRecord = bllRR.GetModel(recordNO);//获得一个model
        rRecord.Status = "已取消";
        if (bllRR.Update(rRecord))
        {
            AddLog.Add("车辆维修记录", "取消车辆维修：" + recordNO, Convert.ToInt32(Session["organid"].ToString()));
            MsgUtil.CreateInstance().ScriptAlert(this, "取消维修成功!", "/Organ/index.aspx", Icons.success);            
        }
        else
        {
            MsgUtil.CreateInstance().ScriptAlert(this, "取消维修失败!", Icons.alert);
        }
    }

      8、发送邮件

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Mail;
namespace Tryine.Common
{
    public class EmailClass
    {
        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="to">收件人邮件地址</param>
        /// <param name="from">发件人邮件地址</param>
        /// <param name="subject">邮件主题</param>
        /// <param name="body">邮件内容</param>
        /// <param name="username">登录smtp主机时用到的用户名,注意是邮件地址'@'以前的部分</param>
        /// <param name="password">登录smtp主机时用到的用户密码</param>
        /// <param name="smtpHost">发送邮件用到的smtp主机</param>
        public void Send(string tos, string froms, string subject, string body, string userName, string password, string smtpHost)
        {
            MailAddress from = new MailAddress(froms);
            MailAddress to = new MailAddress(tos);
            MailMessage message = new MailMessage(from, to);
            
            message.Subject = subject;//设置邮件主题
            message.IsBodyHtml = true;//设置邮件正文为html格式
            message.Body = body;//设置邮件内容
            SmtpClient client = new SmtpClient(smtpHost);
            //设置发送邮件身份验证方式
            //注意如果发件人地址是abc@def.com，则用户名是abc而不是abc@def.com
            client.Credentials = new NetworkCredential(userName, password);
            client.Send(message);
        }
    }
}

 9、搜索框效果

 /* 搜索文本框效果 */
    $(function () {
        $("#searchkey").focus(function () {
            $(this).addClass("focus");
            if ($(this).val() == this.defaultValue) {
                $(this).val("");
            }
        }).blur(function () {
            $(this).removeClass("focus");
            if ($(this).val() == '') {
                $(this).val(this.defaultValue);
            }
        })
    })

10、指定下拉列表的选定项

string pid = ds.Tables[0].Rows[0]["parentID"].ToString();
if (pid != "0")
{
    this.ddl_P.Items.FindByValue(pid).Selected = true;
}

11、