[ASP.NET]工作中经常使用到的方法

    技术2022-05-11  6

    目录:1、给删除按钮添加是否确认提示;2、DataSet中取值;3、字符串截取方法;4、GridView事件中获取GridView中的控件;5、获取GridView的DataKeyNames中主键的ID值;6、ViewState的应用;7、Gridview分页页码突出显示;8、链接打开模式窗口;9、替换字符串里的单引号;10、VS2005显示行号:11、GridView中的RowDataBound 事情对数据列的处理;12、C#读取记事本文件;13、使用LinkButton实现点击下载文件;14、c#使用正则表达式验证网络地址URL;15、页面弹出提示信息;16、判断两个时间比较大小;17、在‘页面’找引用‘用户控件’时的取值;18、GridView上面显示页码;19、fckeditor简要配置说明;20、完成添加后,提示用户是否继续?;21、DataSet循环;22、常用快捷键;23、asp.net页面应用返回按钮;24、javascript 控制前进和后退;25、图片链接新页面;26、CS强制换行;27、jquery验证输入控件;

    --SQL--1、SQL查询某天范围内的数据:2、SQL添加外键关系---------------------------------------------------------------------------------------1、给删除按钮添加是否确认提示:   前台方法:OnClientClick="return window.confirm('你确定要删除吗?')"   后台方法:btnDelete.Attributes.Add("onclick", "return confirm('您确定要删除吗?');"); 2、DataSet中取值:   lblTitle.Text = ds.Tables[0].Rows[0]["Title"].ToString();   3、字符串截取方法:   public string StringFormat(int len, string str)   {      return (str.Length > len) ? str.Substring(0, len) + " ..." : str;   }

    4、GridView事件中获取GridView中的控件:   LinkButton lbtnManager = e.Row.FindControl("lbtnManager") as LinkButton;   5、获取GridView的DataKeyNames中主键的ID值:  int id = Convert.ToInt32((sender as GridView).DataKeys[e.Row.RowIndex].Value.ToString());

    6、ViewState的应用:   [网站前台,尽量禁用ViewState;当然也最好不要使用PostBack] public string vsEName    {        get        {            if (EnableViewState)            {                object obj = ViewState["eName"];                if (obj != null)                    return (string)obj;                else                    return string.Empty;            }            else                return string.Empty;        }        set        {            if (EnableViewState)                ViewState["eName"] = value;        }    }   7、Gridview分页页码突出显示:     protected void gvEquipment_RowCreated(object sender, GridViewRowEventArgs e)    {        if (e.Row.RowType == DataControlRowType.Pager)        {            TableRow row = e.Row.Controls[0].Controls[0].Controls[0] as TableRow;            foreach (TableCell cell in row.Cells)            {                System.Web.UI.Control lb = cell.Controls[0];                if (lb is Label)                {                    ((Label)lb).ForeColor = System.Drawing.Color.Red;                    ((Label)lb).Font.Size = new FontUnit("12px");                }                else if (lb is LinkButton)                {                    ((LinkButton)lb).Text = "[" + ((LinkButton)lb).Text + "]";                }            }        }    } 8、链接打开模式窗口   页面:  <script language="javascript" type="text/javascript">     function orberopen(href)     { window.open(href,'','width=580,height=515,top=10,left=20,scrollbars=yes,resizable=yes');     }      </script>   后台绑定:  litDescription.Text = "<a href='#' title='查看详情' class='afont' οnclick=/"orberopen('" + aLinkURL + "')/">" + desc + "</a>";

    9、替换字符串里的单引号: public static string ReplaceString(string theValue) {   if (theValue != null) theValue = theValue.Replace("'", "''");   return theValue; }10、VS2005显示行号:     后台代码:工具→选项→文本编辑器→C#→显示→(选上)行号    HTML前台:工具→选项→文本编辑器→HTML→(选上)行号

    11、GridView中的RowDataBound 事情对数据列的处理    protected void gridView_RowDataBound(object sender, GridViewRowEventArgs e)    {        if (e.Row.RowType == DataControlRowType.DataRow)        {                    }    }12、C#读取记事本文件  protected void GetVistorCount()    {        try        {            string path = @Server.MapPath("App_Data/VisitorCount.txt");            string text = System.IO.File.ReadAllText(path);            int number = Convert.ToInt32(text);            new FileInfo(path).Attributes = FileAttributes.Normal;            System.IO.File.WriteAllText(path,Convert.ToString(number+1));            labVisitor.Text = number.ToString();        }catch( Exception e)        {                }    }13、使用LinkButton实现点击下载文件  1.页面代码: <asp:LinkButton ID="lbtnAttachName" runat="server" OnClick="lbtnAttachName_Click"></asp:LinkButton>    后台代码:  protected void lbtnAttachName_Click(object sender, EventArgs e)    {        string url = "~/FileDown.aspx?fileName=" + lbtnAttachName.Text.Trim() + "&filePath=~/uploadfile/ArticleAttach/";        Response.Redirect(url);    }

      2.时间里跳到一个页面里面的方法为:     try        {            string fileName = Request.QueryString["fileName"];            string filePath = Request.QueryString["filePath"];            string File_address = Server.MapPath(filePath) + fileName;            if (!File.Exists(File_address))            {                ClientScript.RegisterStartupScript(this.GetType(), "", "alert('文件不存在,下载失败!'); history.back(); ", true);                return;            }             Response.Buffer = true;            string contentType = "application/octet-stream";            //输出流            Response.Clear();            Response.AppendHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));            Response.Charset = "UTF-8"; // 客户端浏览器的字符集UTF-8.注意在IE--Internet选项--高级里,选中:始终用UTF-8发送URL链接            Response.ContentType = contentType;            using (FileStream fs = File.OpenRead(File_address))            {                string strFileSize = fs.Length.ToString();                Response.AppendHeader("Content-Length", strFileSize);                byte[] b = new byte[1024];                while (fs.Read(b, 0, b.Length) > 0)                {                    Response.BinaryWrite(b);                }                Response.Flush();                fs.Close();                    Response.End();            }

            }        catch (Exception ex)        {                    }

    14、c#使用正则表达式验证网络地址URLpublic bool ValidateUrl(string _strUrl)        {            string patten = @"^http://(www/.){0,1}.+/.(com|net|cn)$"; //正则表达式            Regex r = new Regex(patten);           //声明一个Regex对象            Match m = r.Match(_strUrl);            //使用Match方法进行匹配            if (m.Success)      //匹配成功            {                return true;            }            else            {                return false;            }        } 

    15、页面弹出提示信息 普通页面: ClientScript.RegisterStartupScript(this.GetType(), "", "alert('文件不存在,下载失败!'); history.back() ", true);  用户控件使用: Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('请选择完成时间!');", true);  其他方式: ClientScriptManager cs = this.ClientScript;  cs.RegisterArrayDeclaration("Hello", "1, 2, 3");   cs.RegisterClientScriptBlock(this.GetType(), "HelloWorld",      "function helloWorld(){alert('RegisterClientScriptBloc_Test');}", true);  cs.RegisterClientScriptInclude("HelloWorld", "HelloWorld.js");  // cs.RegisterClientScriptResource();  cs.RegisterExpandoAttribute(this.Button1.ClientID, "Hello", "World");  cs.RegisterHiddenField("hello", "world");  cs.RegisterOnSubmitStatement(this.GetType(), "HelloWorld", "return window.confirm('Do you really want to submit the form?')");  cs.RegisterStartupScript(this.GetType(), "HelloWorld", "<script>alert('The page has loaded!')</script>");

    16、判断两个时间比较大小   string startDate ='2009-8-14 10:16:55';   string endDate = '2009-8-14 10:17:13';      DateTime time1 = DateTime.Parse(startDate);   DateTime time2 = DateTime.Parse(endDate);   if (time1 >= time2)   {     throw new Exception("会议结束时间不能小于等于会议开始时间,请重新选择!");   }

    17、在‘页面’找引用‘用户控件’时的取值。   1.得到控件:用户控件.FindControl("控件ID")      Demo:reportTable.FindControl("btSubmit")   2.得到属性:用户控件.属性名称      Demo:reportTable.UserID;

    18、GridView上面显示页码:  <Columns>  ...... </Columns>  <PagerSettings Position="TopAndBottom" />

    19、fckeditor简要配置说明 1.把fckeditor文件夹放到项目下,及FredCK.FCKeditorV2.dll放到项目Bin目录下。 2.web.config配置     <appSettings>      <!--FCKeditor用户附件上传路径-->      <add key="FCKeditor:UserFilesPath" value="Web/PublicSource/UpLoad/"/>    </appSettings> 3.页面顶部配置    <%@ Register Assembly="FredCK.FCKeditorV2" Namespace="FredCK.FCKeditorV2" TagPrefix="FCKeditorV2" %> 4.页面使用位置配置    <FCKeditorV2:FCKeditor ID="txtContents" runat="server" Height="550px" Width="450px"     BasePath="~/fckeditor/" ToolbarSet="">        </FCKeditorV2:FCKeditor>

    20、完成添加后,提示用户是否继续?    ClientScript.RegisterClientScriptBlock(this.GetType(), "提示信息",                   " if( window.confirm('新闻添加成功 (*^__^*),您是否想继续添加?'))"                    + " { window.location.href='NewsEdit.aspx' } "                    + " else {  window.location.href='NewsList.aspx' } "               , true);

    21、DataSet循环: if (ds.Tables.Count == 1 && ds.Tables[0].Rows.Count != 0)            {                for (int i = 0; i < ds.Tables[0].Rows.Count; i++)                {                    imagesPath.Add(ds.Tables[0].Rows[i]["ImagesPath"].ToString());                }                return imagesPath;            }            22、常用快捷键1. Ctrl + K + D :格式化代码。前台后台代码都适用。(vs 2005以上版本)2. Ctrl + K + C :批量注释代码。3. Ctrl + K + U : 批量取消注释代码。4. Shift + Del  删除当前行。5. Ctrl + Shift + A : 添加新项。6.  Ctrl + J :调出智能提示。7. Ctrl + Alt + L : 调出解决方案资源管理器。8. Ctrl + M + M : 折叠/收缩 Region 指令区代码。9. F7 : 从前台源代码视图切换到后台代码视图。10. Shift + F7 : 从前台源代码视图切换到可视化视图。11. Ctrl + I : 渐进式搜索。12. F9 : 添加/删除断点。13. F10: 逐过程调试。14. F11 : 逐语句调试。15. F5 :启动调试。16. Ctrl + F5 : 开始执行(不调试)。17: Shift + F5 : 停止调试。18: Ctrl + Shift + F5 : 重新启动调试。19: Ctrl + Alt + I : 调出立即窗口(立即窗口非常有用,在调试过程中,可以监控任何变量的值。)20. Ctrl + Alt + O :调出输出窗口(可以查看编译过程中的错误或警告信息).21. Tab : 先选中代码,再按tab 键可以缩进代码。22. Shift + tab :选中代码,可反向缩进代码。(对于格式化js 很有用)23. Shift + Alt + Enter : 全屏显示与切换。

    23、asp.net页面应用返回按钮 <input id="Button1"  type="button" value="返回" class="button2"   οnclick="window.location.href('CollegeDoc.aspx')" />  24、javascript 控制前进和后退:使用history对象    history.back();//相当于用户单击“后退”按钮   history.forward();//相当于用户单击“前进”按钮   history.go(-2);//相当于用户单击两次“后退”按钮   25、图片链接新页面<img height="30" alt="" src="images/index11.jpg" width="529"  style="cursor:pointer"     border="0"  οnclick="javascript:window.location.href ='AcademyLog.aspx?type=News'"/>       26、CS强制换行   style="word-wrap: break-word; "     27、jquery验证输入控件   1.给项目添加jquery使用文件包   2.页面添加引用     <script src="../js/jquery_last.js" type="text/javascript"></script>    <link type="text/css" rel="stylesheet" href="../css/validator.css" />    <script src="../js/formValidator.js" type="text/javascript" charset="UTF-8"></script>    <script src="../js/formValidatorRegex.js" type="text/javascript" charset="UTF-8"></script>    <script type="text/javascript" src="../js/datepicker/WdatePicker.js" defer="defer"></script>  3.页面输入控件及引用配置    <script type="text/javascript"> $(document).ready(function(){ $.formValidator.initConfig({formid:"form1",onerror:function(msg){}}); $("#txtTitle").formValidator({onshow:"请输入新闻标题",onfocus:"新闻标题为必填项!"}). inputValidator({min:1,onerror:"新闻标题不能为空"}); });   </script>     <asp:TextBox ID="txtTitle" runat="server" Width="539px" MaxLength="60"></asp:TextBox>  <div id="txtEquipmentNameTip" style="width:250px"></div>

    --SQL--1、SQL查询某天范围内的数据:   Select * from Notepad where 1=1  and UploadDate  > '2009-7-24 0:00:00' and UploadDate  < '2009-7-24 23:59:59'  order by UploadDate desc

    2、SQL添加外键关系-- alter table 需要建外键的表add constraint 外键名字(FK_字段名) foreign key(外键字段)  references 外键表(外键字段) , alter table MeetingRoom add constraint FK_Responder foreign key(Responder) references web_Users(UserId)

     

     

        


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