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在aspx页面中使用aspx用户控件的多个实例(Using multiple instances of an aspx user control in a aspx page)

我在aspx页面中使用多个aspx用户控件实例时遇到问题。 当我尝试通过Java脚本获取User控件元素值时会发生这种情况。

用户控制代码:

<script type="text/javascript">
    function ucFun()
    {
        var a = document.getElementById("<%=tbName.ClientID%>");
        alert(a.value);
        return false;
    }
</script>
<asp:Label Text="Name" runat="server" ID="lblname"></asp:Label>
<asp:TextBox ID="tbName" runat="server" ></asp:TextBox>
<asp:Button ID="btSubmit" runat="server" Text="Go" OnClientClick="ucFun()" />

网页表格代码

<html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <title></title>
    </head>
    <body>
        <form id="form1" runat="server">
            <div>
            <uc:cont runat="server" ID="ucID" />
                <uc:cont runat="server" ID="Cont1" />
                <uc:cont runat="server" ID="Cont2" />
            </div>
        </form>
    </body>
</html>

单击Go按钮时,它会显示null int he alert box,因为元素未定义。 但是,当我在窗体中有一个用户控件实例时,它正确显示文本框值。

我们有什么方法可以写这个..


I am facing a problem in using more than one instance of an aspx user control in a aspx page. This happens when I tried to fetch User control element value through Java script.

User Control Code:

<script type="text/javascript">
    function ucFun()
    {
        var a = document.getElementById("<%=tbName.ClientID%>");
        alert(a.value);
        return false;
    }
</script>
<asp:Label Text="Name" runat="server" ID="lblname"></asp:Label>
<asp:TextBox ID="tbName" runat="server" ></asp:TextBox>
<asp:Button ID="btSubmit" runat="server" Text="Go" OnClientClick="ucFun()" />

Web Form Code

<html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <title></title>
    </head>
    <body>
        <form id="form1" runat="server">
            <div>
            <uc:cont runat="server" ID="ucID" />
                <uc:cont runat="server" ID="Cont1" />
                <uc:cont runat="server" ID="Cont2" />
            </div>
        </form>
    </body>
</html>

on clicking the Go button, it displays null int he alert box, as the element is undefined. However, When I have one instance of User control in the form, it rightly displayed the text box value.

Is there any way we should write this..


原文:
更新时间:2022-09-28 15:09

最满意答案

iOS 5中 ,您可以使用一系列图像。 首先,您需要添加一个新的类别方法:

类别

@interface UIImage (WrightsCS)
+(UIImage*)animatedImageWithImages:(NSArray*)images duration:(NSTimeInterval)duration;
@end

+(UIImage*)loadingImage
{
    NSArray *animationFrames = [NSArray arrayWithObjects:
                                        [UIImage imageNamed:@"downloading01.png"],
                                        [UIImage imageNamed:@"downloading02.png"],
                                        [UIImage imageNamed:@"downloading03.png"],
                                        [UIImage imageNamed:@"downloading04.png"],
                                        [UIImage imageNamed:@"downloading05.png"],
                                        [UIImage imageNamed:@"downloading06.png"],
                                        [UIImage imageNamed:@"downloading07.png"],
                                        [UIImage imageNamed:@"downloading08.png"],
                                        [UIImage imageNamed:@"downloading09.png"],
                                        [UIImage imageNamed:@"downloading10.png"],
                                        [UIImage imageNamed:@"downloading11.png"],
                                        [UIImage imageNamed:@"downloading12.png"],
                                        [UIImage imageNamed:@"downloading13.png"],
                                        [UIImage imageNamed:@"downloading14.png"],
                                        [UIImage imageNamed:@"downloading15.png"],
                                        [UIImage imageNamed:@"downloading16.png"],
                                nil];
    return [UIImage animatedImageWithImages:animationFrames duration:1.0f];
}

In iOS 5, you can use a sequence of images. First you will need to add a new category method:

Category

@interface UIImage (WrightsCS)
+(UIImage*)animatedImageWithImages:(NSArray*)images duration:(NSTimeInterval)duration;
@end

Example

+(UIImage*)loadingImage
{
    NSArray *animationFrames = [NSArray arrayWithObjects:
                                        [UIImage imageNamed:@"downloading01.png"],
                                        [UIImage imageNamed:@"downloading02.png"],
                                        [UIImage imageNamed:@"downloading03.png"],
                                        [UIImage imageNamed:@"downloading04.png"],
                                        [UIImage imageNamed:@"downloading05.png"],
                                        [UIImage imageNamed:@"downloading06.png"],
                                        [UIImage imageNamed:@"downloading07.png"],
                                        [UIImage imageNamed:@"downloading08.png"],
                                        [UIImage imageNamed:@"downloading09.png"],
                                        [UIImage imageNamed:@"downloading10.png"],
                                        [UIImage imageNamed:@"downloading11.png"],
                                        [UIImage imageNamed:@"downloading12.png"],
                                        [UIImage imageNamed:@"downloading13.png"],
                                        [UIImage imageNamed:@"downloading14.png"],
                                        [UIImage imageNamed:@"downloading15.png"],
                                        [UIImage imageNamed:@"downloading16.png"],
                                nil];
    return [UIImage animatedImageWithImages:animationFrames duration:1.0f];
}

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