zoukankan      html  css  js  c++  java
  • 为继承masterpage的页面设置defaultbutton和defaultfocus

    一个普通的aspx页面,我们可以很容易地为其设置设置defaultbutton和defaultfocus,具体如下:

    .aspx:

     <form id="form1" runat="server">
            <div>
                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                <asp:Button ID="Button1" Text="Button1" runat="server" OnClick="Button1_Click"></asp:Button>
                <asp:Button ID="SubmitButton" Text="Submit" runat="server" OnClick="SubmitButton_Click">
                </asp:Button>
            </div>
        </form>

    .cs:

     protected void Page_Load(object sender, EventArgs e)
        {
            this.Form.DefaultButton = SubmitButton.ID ;
            this.Form.DefaultFocus = TextBox1.ID;
        }

    但是如果我们的页面是继承于一个masterpage的,形如:

    .aspx:

    <asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" Text="Button1" runat="server" OnClick="Button1_Click"></asp:Button>
        <asp:Button ID="SubmitButton" Text="Submit" runat="server" OnClick="SubmitButton_Click">
        </asp:Button>
    </asp:Content>

    .cs: 

    protected void Page_Load(object sender, EventArgs e)
        {
            this.Form.DefaultButton = SubmitButton.ID;
            this.Form.DefaultFocus = TextBox1.ClientID;
        }
    在执行时就会提示出现“The DefaultButton of 'form1' must be the ID of a control of type IButtonControl. ”的异常;解决的办法是:在这个页面,用一个panel控件把textbox, button包起来,比如:

    .aspx:

    <asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
        <asp:panel id="panel" runat="server">
            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            <asp:Button ID="Button1" Text="Button1" runat="server" OnClick="Button1_Click"></asp:Button>
            <asp:Button ID="SubmitButton" Text="Submit" runat="server" OnClick="SubmitButton_Click">
            </asp:Button>
        </asp:panel>
    </asp:Content>

    .cs:

    protected void Page_Load(object sender, EventArgs e)
        {
            panel.DefaultButton  = SubmitButton.ID;
            this.Form.DefaultFocus = TextBox1.ClientID;
        }

  • 相关阅读:
    BFS visit tree
    Kth Largest Element in an Array 解答
    Merge k Sorted Lists 解答
    Median of Two Sorted Arrays 解答
    Maximal Square 解答
    Best Time to Buy and Sell Stock III 解答
    Best Time to Buy and Sell Stock II 解答
    Best Time to Buy and Sell Stock 解答
    Triangle 解答
    Unique Binary Search Trees II 解答
  • 原文地址:https://www.cnblogs.com/aspsmile/p/1317553.html
Copyright © 2011-2022 走看看