Question

我有三个图像按钮，他们有默认图像网址，我试图在用户点击任何图像按钮时更改图像网址，当用户点击其他图像按钮时默认检索按钮试图这样做但我没有

<aspx>
<div class="hom_but_sa hom_but_saR">
    <asp:ImageButton ID="BTNPromotion" ImageUrl="images/home-bu_npro.jpg"
        runat="server" Width="134" Height="34" border="0"
        OnClick="BTNPromotion_Click" />
</div>
<div class="hom_but_a hom_but_sbR">
    <asp:ImageButton ID="BTNNewProduct" ImageUrl="images/home-bu_pro.jpg"
        runat="server" Width="134" Height="34" border="0" 
        OnClick="BTNNewProduct_Click" />
</div>
<div class="hom_but_a">
    <asp:ImageButton ID="BTNEvent" runat="server" ImageUrl="images/home-bu_news.jpg"
        Width="134" Height="34" border="0" OnClick="BTNEvent_Click" />
</div>
</div>

<cs>
protected void BTNEvent_Click(object sender, ImageClickEventArgs e)
{        
    BTNEvent.ImageUrl = "images/home-bu_news.jpg";      
}
protected void BTNNewProduct_Click(object sender, ImageClickEventArgs e)
{
    BTNNewProduct.ImageUrl = "images/home-bu_pro_r.jpg";
}
protected void BTNPromotion_Click(object sender, ImageClickEventArgs e)
{     
    BTNPromotion.ImageUrl = "images/home-bu_npro_r.jpg";
}

Answer 1

根据我的评论，我不确定你的实际问题是什么，但也许你想要某种类似这样的切换？

protected void BTNEvent_Click(object sender, ImageClickEventArgs e) 
{         
    BTNEvent.ImageUrl = "images/home-bu_news_r.jpg";
    BTNNewProduct.ImageUrl = "images/home-bu_pro.jpg"; 
    BTNPromotion.ImageUrl = "images/home-bu_npro.jpg"; 
} 
protected void BTNNewProduct_Click(object sender, ImageClickEventArgs e) 
{ 
    BTNEvent.ImageUrl = "images/home-bu_news.jpg";
    BTNNewProduct.ImageUrl = "images/home-bu_pro_r.jpg"; 
    BTNPromotion.ImageUrl = "images/home-bu_npro.jpg"; 

} 
protected void BTNPromotion_Click(object sender, ImageClickEventArgs e) 
{      
    BTNEvent.ImageUrl = "images/home-bu_news.jpg";
    BTNNewProduct.ImageUrl = "images/home-bu_pro.jpg"; 
    BTNPromotion.ImageUrl = "images/home-bu_npro_r.jpg"; 
}

更简洁的方法是让一个点击事件通过将一个事件附加到所有ImageButton OnClick来处理它：

OnClick="BTN_Click"

然后实现Click之类的：

protected void BTN_Click(object sender, ImageClickEventArgs e)
{
    ImageButton btn = (ImageButton)(sender);
    BTNEvent.ImageUrl = (btn.ID.Equals("BTNEvent")) ? 
        "images/home-bu_news_r.jpg" : "images/home-bu_news.jpg";
    BTNNewProduct.ImageUrl = (btn.ID.Equals("BTNNewProduct")) ?
        "images/home-bu_pro_r.jpg" : "images/home-bu_pro.jpg";
    BTNPromotion.ImageUrl = (btn.ID.Equals("BTNPromotion")) ?
        "images/home-bu_npro_r.jpg" : "images/home-bu_npro.jpg";
}

Answer 2

尝试在ImageButton上设置EnableViewState="false"

Answer 3

这可以通过Javascript轻松实现。在所有三个按钮的onclick事件中调用以下功能，请检查以下代码，

function imageurl(id)
{
//assuming image button ids as test1,test2,test3

 switch(id)
 {
    case 'test1':
       document.getElementById('test1').href = 'test1newurl';
       document.getElementById('test2').href = 'test2oldurl';
       document.getElementById('test3').href = 'test3oldurl';
    break;

    case 'test1':
       document.getElementById('test1').href = 'test1oldurl';
       document.getElementById('test2').href = 'test2newurl';
       document.getElementById('test3').href = 'test3oldurl';
    break;

    case 'test1':
       document.getElementById('test1').href = 'test1oldurl';
       document.getElementById('test2').href = 'test2oldurl';
       document.getElementById('test3').href = 'test3newurl';
    break;
 }

}

单击图像按钮时更改图像URL

3 个答案: