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The author:(作者)delvpublished in(发表于) 2014/1/10 6:28:41 ASP.NET程序中常用的三十三种代码1_[Asp.Net教程]
. 打开新的窗口并传送参数 传送参数： Response.Write("window.open('*.aspx?id=" + this.DropDownList1.SelectIndex + "&id1=" + ... + "'"); 接收参数： string a = Request.QueryString["id"]; string b = Request.QueryString["id1"]; 2. 为按钮添加对话框 Button1.Attributes.Add("onclick", "return confirm('确认?')"); Button1.Attributes.Add("onclick", "if (confirm('are you sure...?')) { return true; } else { return false; }"); 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; 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; } } 5. 点击表格行链接另一页 private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) { 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 + "’)"); } 6. 表格超连接列传递参数 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=’’;"); } 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")) 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 10.清空Cookie Cookie.Expires=[DateTime]; Response.Cookies("UserName").Expires = 0 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.Inf 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 } 12.Panel 横向滚动，纵向自动扩展 ＜asp:panel style="overflow-x:scroll;overflow-y:auto;"＞＜/asp:panel＞ 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" 14.DataGrid超级连接列 DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}" 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"+"\""); } } 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; } } }
来源:Csdn
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