以下总结三十三条ASP.NET常用代码,为初学者多多积累经验,为高手们归纳总结。
ASP.NET常用代码之1. 打开新的窗口并传送参数:
传送参数:
- response.write("<script>window.open(’*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"’)</script>")
接收参数:
- string a = Request.QueryString("id");
- string b = Request.QueryString("id1");
ASP.NET常用代码之2.为按钮添加对话框
- Button1.Attributes.Add("onclick","return confirm(’确认?’)");
- button.attributes.add("onclick","if(confirm(’are you sure...?’)){return true;}else{return false;}")
ASP.NET常用代码之3.删除表格选定记录
- int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
- string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString()
ASP.NET常用代码之4.删除表格记录警告
- private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)
- {
- switch(e.Item.ItemType)
- {
- case ListItemType.Item :
- case ListItemType.AlternatingItem :
- case ListItemType.EditItem:
- TableCell myTableCell;
- myTableCell = e.Item.Cells[14];
- LinkButton myDeleteButton ;
- myDeleteButton = (LinkButton)myTableCell.Controls[0];
- myDeleteButton.Attributes.Add("onclick","return confirm(’您是否确定要删除这条信息’);");
- break;
- default:
- break;
- }
- }
ASP.NET常用代码之5.点击表格行链接另一页
- private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
- {
- //点击表格打开
- if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
- e.Item.Attributes.Add("onclick","window.open(’Default.aspx?id=" + e.Item.Cells[0].Text + "’);");
- }
- 双击表格连接到另一页
- 在itemDataBind事件中
- if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
- {
- string OrderItemID =e.item.cells[1].Text;
- ...
- e.item.Attributes.Add("ondblclick", "location.href=’../ShippedGrid.aspx?id=" + OrderItemID + "’");
- }
- 双击表格打开新一页
- if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
- {
- string OrderItemID =e.item.cells[1].Text;
- ...
- e.item.Attributes.Add("ondblclick", "open(’../ShippedGrid.aspx?id=" + OrderItemID + "’)");
- }
★特别注意:【?id=】 处不能为 【?id =】
ASP.NET常用代码之6.表格超连接列传递参数
- <asp:HyperLinkColumn Target="_blank" headertext="ID号" DataTextField="id" NavigateUrl="aaa.aspx?id=’
- <%# DataBinder.Eval(Container.DataItem, "数据字段1")%>’ & name=’<%# DataBinder.Eval(Container.DataItem, "数据字段2")%>’ />
ASP.NET常用代码之7.表格点击改变颜色
- if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
- {
- e.Item.Attributes.Add("onclick","this.style.backgroundColor=’#99cc00’;
- this.style.color=’buttontext’;this.style.cursor=’default’;");
- }
写在DataGrid的_ItemDataBound里
- if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
- {
- e.Item.Attributes.Add("onmouseover","this.style.backgroundColor=’#99cc00’;
- this.style.color=’buttontext’;this.style.cursor=’default’;");
- e.Item.Attributes.Add("onmouseout","this.style.backgroundColor=’’;this.style.color=’’;");
- }
ASP.NET常用代码之8.关于日期格式
日期格式设定:
- DataFormatString="{0:yyyy-MM-dd}"
我觉得应该在itembound事件中
- e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))
ASP.NET常用代码之9.获取错误信息并到指定页面
不要使用Response.Redirect,而应该使用Server.Transfer
e.g
- // in global.asax
- protected void Application_Error(Object sender, EventArgs e) {
- if (Server.GetLastError() is HttpUnhandledException)
- Server.Transfer("MyErrorPage.aspx");
- //其余的非HttpUnhandledException异常交给asp.net自己处理就okay了 :)
- }
Redirect会导致post-back的产生从而丢失了错误信息,所以页面导向应该直接在服务器端执行,这样就可以在错误处理页面得到出错信息并进行相应的处理
ASP.NET常用代码之10.清空Cookie
- Cookie.Expires=[DateTime];
- Response.Cookies("UserName").Expires = 0
#p#
ASP.NET常用代码之11.自定义异常处理
- //自定义异常处理类
- using System;
- using System.Diagnostics;
- namespace MyAppException
- {
- /// <summary>
- /// 从系统异常类ApplicationException继承的应用程序异常处理类。
- /// 自动将异常内容记录到Windows NT/2000的应用程序日志
- /// </summary>
- public class AppException:System.ApplicationException
- {
- public AppException()
- {
- if (ApplicationConfiguration.EventLogEnabled)LogEvent("出现一个未知错误。");
- }
- public AppException(string message)
- {
- LogEvent(message);
- }
- public AppException(string message,Exception innerException)
- {
- LogEvent(message);
- if (innerException != null)
- {
- LogEvent(innerException.Message);
- }
- }
- //日志记录类
- using System;
- using System.Configuration;
- using System.Diagnostics;
- using System.IO;
- using System.Text;
- using System.Threading;
- namespace MyEventLog
- {
- /// <summary>
- /// 事件日志记录类,提供事件日志记录支持
- /// <remarks>
- /// 定义了4个日志记录方法 (error, warning, info, trace)
- /// </remarks>
- /// </summary>
- public class ApplicationLog
- {
- /// <summary>
- /// 将错误信息记录到Win2000/NT事件日志中
- /// <param name="message">需要记录的文本信息</param>
- /// </summary>
- public static void WriteError(String message)
- {
- WriteLog(TraceLevel.Error, message);
- }
- /// <summary>
- /// 将警告信息记录到Win2000/NT事件日志中
- /// <param name="message">需要记录的文本信息</param>
- /// </summary>
- public static void WriteWarning(String message)
- {
- WriteLog(TraceLevel.Warning, message);
- }
- /// <summary>
- /// 将提示信息记录到Win2000/NT事件日志中
- /// <param name="message">需要记录的文本信息</param>
- /// </summary>
- public static void WriteInfo(String message)
- {
- WriteLog(TraceLevel.Info, message);
- }
- /// <summary>
- /// 将跟踪信息记录到Win2000/NT事件日志中
- /// <param name="message">需要记录的文本信息</param>
- /// </summary>
- public static void WriteTrace(String message)
- {
- WriteLog(TraceLevel.Verbose, message);
- }
- /// <summary>
- /// 格式化记录到事件日志的文本信息格式
- /// <param name="ex">需要格式化的异常对象</param>
- /// <param name="catchInfo">异常信息标题字符串.</param>
- /// <retvalue>
- /// <para>格式后的异常信息字符串,包括异常内容和跟踪堆栈.</para>
- /// </retvalue>
- /// </summary>
- public static String FormatException(Exception ex, String catchInfo)
- {
- StringBuilder strBuilder = new StringBuilder();
- if (catchInfo != String.Empty)
- {
- strBuilder.Append(catchInfo).Append("\r\n");
- }
- strBuilder.Append(ex.Message).Append("\r\n").Append(ex.StackTrace);
- return strBuilder.ToString();
- }
- /// <summary>
- /// 实际事件日志写入方法
- /// <param name="level">要记录信息的级别(error,warning,info,trace).</param>
- /// <param name="messageText">要记录的文本.</param>
- /// </summary>
- private static void WriteLog(TraceLevel level, String messageText)
- {
- try
- {
- EventLogEntryType LogEntryType;
- switch (level)
- {
- case TraceLevel.Error:
- LogEntryType = EventLogEntryType.Error;
- break;
- case TraceLevel.Warning:
- LogEntryType = EventLogEntryType.Warning;
- break;
- case TraceLevel.Info:
- LogEntryType = EventLogEntryType.Information;
- break;
- case TraceLevel.Verbose:
- LogEntryType = EventLogEntryType.SuccessAudit;
- break;
- default:
- LogEntryType = EventLogEntryType.SuccessAudit;
- break;
- }
- EventLog eventLog = new EventLog("Application", ApplicationConfiguration.EventLogMachineName, ApplicationConfiguration.EventLogSourceName );
- //写入事件日志
- eventLog.WriteEntry(messageText, LogEntryType);
- }
- catch {} //忽略任何异常
- }
- } //class ApplicationLog
- }
ASP.NET常用代码之12.Panel 横向滚动,纵向自动扩展
- <asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>
ASP.NET常用代码之13.回车转换成Tab
- <script language="javascript" for="document" event="onkeydown">
- if(event.keyCode==13 && event.srcElement.type!=’button’ && event.srcElement.type!=’submit’ && event.srcElement.type!=’reset’ && event.srcElement.type!=’’&& event.srcElement.type!=’textarea’);
- event.keyCode=9;
- </script>
- onkeydown="if(event.keyCode==13) event.keyCode=9"
ASP.NET常用代码之14.DataGrid超级连接列
- DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}"
ASP.NET常用代码之15.DataGrid行随鼠标变色
- private void DGzf_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
- {
- if (e.Item.ItemType!=ListItemType.Header)
- {
- e.Item.Attributes.Add( "onmouseout","this.style.backgroundColor=\""+e.Item.Style["BACKGROUND-COLOR"]+"\"");
- e.Item.Attributes.Add( "onmouseover","this.style.backgroundColor=\""+ "#EFF3F7"+"\"");
- }
- }
ASP.NET常用代码之16.模板列
- <ASP:TEMPLATECOLUMN visible="False" sortexpression="demo" headertext="ID">
- <ITEMTEMPLATE>
- <ASP:LABEL text=’<%# DataBinder.Eval(Container.DataItem, "ArticleID")%>’ runat="server" width="80%" id="lblColumn" />
- </ITEMTEMPLATE>
- </ASP:TEMPLATECOLUMN>
- <ASP:TEMPLATECOLUMN headertext="选中">
- <HEADERSTYLE wrap="False" horizontalalign="Center"></HEADERSTYLE>
- <ITEMTEMPLATE>
- <ASP:CHECKBOX id="chkExport" runat="server" />
- </ITEMTEMPLATE>
- <EDITITEMTEMPLATE>
- <ASP:CHECKBOX id="chkExportON" runat="server" enabled="true" />
- </EDITITEMTEMPLATE>
- </ASP:TEMPLATECOLUMN>
后台代码
- protected void CheckAll_CheckedChanged(object sender, System.EventArgs e)
- {
- //改变列的选定,实现全选或全不选。
- CheckBox chkExport ;
- if( CheckAll.Checked)
- {
- foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
- {
- chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
- chkExport.Checked = true;
- }
- }
- else
- {
- foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
- {
- chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
- chkExport.Checked = false;
- }
- }
- }
以上就是asp.net常用代码中的前16个,后面的将在asp.net中的常用简单代码之二中给大家介绍。
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