[How Do I] Learn the Tips and Tricks of Experts

1.获取前一个页面的信息：

Page1：

 

 <form id="form1" runat="server"  defaultbutton="Button1" defaultfocus="TextBox1" >
    <div>
    
    <asp:TextBox ID="TextBox1"
                  runat="server">
                  </asp:TextBox>
    <br />
    <asp:Calendar ID="Calendar1"
                  runat="server">
                  </asp:Calendar>
     <br />
     <asp:Button ID="Button1" 
                 runat="server" 
                 PostBackUrl="~/Page2.aspx" 
                 Text="Button" />
    </div>
    </form>

Page2：

 

 

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                TextBox t = ((TextBox)(PreviousPage.FindControl("TextBox1")));
                Calendar c = ((Calendar)(PreviousPage.FindControl("Calendar1")));
                Label1.Text = string.Format("Hello {0},you clicked on {1}",t.Text ,c.SelectedDate );
            }
        }

2.几种控件用法：

 

 <div>
      <asp:RadioButtonList ID="RadioButtonList1" 
                           runat="server" 
                           AutoPostBack="True" 
                           RepeatDirection="Horizontal" 
                           onselectedindexchanged="RadioButtonList1_SelectedIndexChanged" >
                <asp:ListItem Value="0">Bulleted List</asp:ListItem>
                <asp:ListItem Value="1">File Upload</asp:ListItem>
                <asp:ListItem Value="2">URL Mapping</asp:ListItem>
            </asp:RadioButtonList><br />
   
        
        <asp:MultiView ID="MultiView1" 
                       runat="server">
            <asp:View ID="View1" runat="server">
            
               Bulleted List Control<br />
                <asp:BulletedList ID="BulletedList1"
                                  runat="server" 
                                  DataSourceID="XmlDataSource1" 
                                  DataTextField="text" 
                                  DataValueField="url" 
                                  DisplayMode="HyperLink">
                </asp:BulletedList>
                
            </asp:View>
            <asp:View ID="View2" runat="server">
            
                File Upload Control<br />
                <asp:FileUpload ID="FileUpload1" runat="server" />
                <br />
                <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="UpLoad" />
                <br />
                <asp:HyperLink ID="HyperLink1" runat="server">HyperLink</asp:HyperLink>
                
            </asp:View>
            <asp:View ID="View3" runat="server">
            
                    URL mapping<br />
                    <a href="guid_{492f3e0b-848e-11da-9550-00e08161165f}.htm">
                    guid_{492f3e0b-848e-11da-9550-00e08161165f}.htm</a><br />
                    <br />
                    <a href="guid.htm">guid.htm</a>
                    <br />
                    
            </asp:View>
        </asp:MultiView>
        
        <asp:XmlDataSource ID="XmlDataSource1" runat="server" 
            DataFile="~/hyperlinks.xml"></asp:XmlDataSource>
    </div>

  protected void Button1_Click(object sender, EventArgs e)
        {
            if (FileUpload1.HasFile)
            {
                FileUpload1.SaveAs(this.MapPath("upload\\" + FileUpload1.FileName));
                HyperLink1.Text = FileUpload1.FileName;
                HyperLink1.NavigateUrl = ("upload\\" + FileUpload1.FileName);
            }
            
        }

        protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            MultiView1.ActiveViewIndex = Convert.ToInt32(RadioButtonList1.SelectedValue);
        }

 

<system.web>
        <!-- 
            设置 compilation debug="true" 可将调试符号插入
            已编译的页面中。但由于这会 
            影响性能，因此只在开发过程中将此值 
            设置为 true。
        -->
    <urlMappings enabled="True">
      <add url="~/guid.htm" mappedUrl="guid_{492f3e0b-848e-11da-9550-00e08161165f}.htm"/>
    </urlMappings>