程序中如何遍历内容中有IMG

Question

如何在已知内容的情况下,找到内容中所有IMG,并更改它的SRC.

Answer 1

引自：http://blog.csdn.net/yicel/archive/2007/03/08/1523780.aspx
某些时候我们需要遍历控件对象的属性,可以如下操作.   var e=document.createElement("input");
            e.id="txtID";
            e.type="text";
            var s="";
            var n=0;
            for(var key in e)
            {
                if(n%8==0){s+=key+"="+e[key]+"\r\n";n++}
                else{s+=key+"="+e[key]+";  ";n++}
            }
            alert(s);
 对于一些控件某些属性不能够通过htmlElement [key]访问.访问会包Automation错误例如type="image"的时候.这时候也许那些让我们出错的属性我们并不需要.所有我们可以用try{}cath(){}跳过如下                   var e=document.createElement("input");
            e.id="txtID";
            e.type="image";
            var s="";
            var n=0;
            for(var key in e)
            {
                try{
                        if(n%8==0)
                        {
                            s+=key+"="+e[key]+"\r\n";n++;
                        }
                        else
                        {
                            s+=key+"="+e[key]+";  ";n++;
                        }
                 }catch(e)
                 {
                    s+=key+"="+"错误的属性；";
                 }
            }
            alert(s);

Answer 2

将上述代码分别
写入jscript 方法体
即
function test()
(
    var e=document.createElement("input");
            e.id="txtID";
            e.type="image";
            var s="";
            var n=0;
            for(var key in e)
            {
                try{
                        if(n%8==0)
                        {
                            s+=key+"="+e[key]+"\r\n";n++;
                        }
                        else
                        {
                            s+=key+"="+e[key]+";  ";n++;
                        }
                 }catch(e)
                 {
                    s+=key+"="+"错误的属性；";
                 }
            }
            alert(s);
)

Answer 3

格式为<input type="image" src="img/Edit.gif">
的可用函数
function changeSrc()
{
    var list=document.getElementsByTagName("input");    
    for(var i=0;i<list.length;i++)
    {
        if(list[i].type=="image")
        {
            list[i].src="test.gif";
        }
    }
}

Answer 4

function test()
{
    var list=document.getElementsByTagName("img");
    
    for(var i=0;i<list.length;i++)
    {       
        list[i].src="1.gif";
    }
}

Answer 5

var form = window.document.forms[0]
for (var i = 0; i<form.elements.length;i++){
    if (form.elements.type == "image"){
        form.elements.src= ;
    }
}

Answer 6

 for (int i = 0; i < lblContent.Text.Length; i++)
            {
                if (lblContent.Text[i].GetType() ==Type.GetType("Image"))
                {
                    ((Image)lblContent.Text[i]).ImageUrl = ConfigurationManager.AppSettings["url"].ToString() + ((Image)lblContent.Text[i]).ImageUrl;
                }
            }
...上面的代码是错误的.不过可以帮助我说明我的这个问题.
因为是要从文本内容中得到有<IMG>标签的.可是像这样的判断,如何找得到IMG.因为lblContent.Text[i]它是一个CHAR类型的.而更改图片的源又必要找到图片,才能改变它的SRC.

Answer 7

认为 最简单的 document.images
数组

Answer 8

最终解决办法:
this.lblCreateTime.Text = info.createTime.ToString();
            if (info.content.IndexOf("src=\"/Images/FTB") > 0)
            {
                this.lblContent.Text = info.content.Replace("src=\"/Images/FTB", String.Format("src=\"{0}/Images/FTB", ConfigurationManager.AppSettings["url"]));
            }
            else
            {
                this.lblContent.Text = info.content;            }