Question

做Ajax的示例，文本框中的用户类型及其文本使用javascript连续发回，同时显示结果是否可用。

主 html 外观如

 <body>
            <h3>The chuff Bucket </h3>
            Enter the food you like to order:
            <input type="text" id="userInput" onfocus="process()"/>
            <div id="underInput"/>
 </body>

这是我的javascript代码

var xmlHttp = createXmlHttpRequestObject();    

function createXmlHttpRequestObject() {
    var xmlHttp;

    if (window.ActiveXObject) {
        try {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch (e) {
            xmlHttp = false;
        }
    } else {
        try {
            xmlHttp = new XMLHttpRequest();
        }
        catch (e) {
            xmlHttp = false;
        }
    }

    if (!xmlHttp) {
        alert("cant create that object boss!");
    } else
        return xmlHttp;

}


function process() {
    if (xmlHttp.readyState == 0 || xmlHttp.readyState == 4) {
        food = encodeURIComponent(document.getElementById("userInput").value);
        xmlHttp.open("GET", "foodstore.aspx?food=" + food, true);

        xmlHttp.onreadystatechange = handleServerResponse;
        xmlHttp.send(null);

    } else {
        setTimeout('process()', 1000);
    }
}

function handleServerResponse() {
    if (xmlHttp.readyState == 4) {
        if (xmlHttp.status == 200) {
            xmlResponse = xmlHttp.responseXML;
            xmlDocumentElement = xmlResponse.documentElement;
            message = xmlDocumentElement.firstChild.data;

            document.getElementById("underInput").innerHTML = '<span style = "color:blue;">' + message + '</span>';
            setTimeout('process()', 1000);
        } else {
            alert('Something went wrong');
        }
    }
}

php的代码工作正常，

<?php

header('Content-Type: text/xml');
echo '<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>';

echo '<response>';
     $food = $_GET['food'];
     $foodArray = array("tuna","bacon","beef","mutton","biryani");

     if($food == '')
         echo 'Enter a food you idiot.';
     else{
         if(in_array($food,$foodArray))
          echo 'We do have '.$food.'!';
         else
          echo 'We do not sell '.$food.'!';
     }
echo '</response>';
?>

但是当转换为asp.net时，它是回发并且正在工作但没有在div中显示reult。我找出相关回声线的主要原因

protected void Page_Load(object sender, EventArgs e)
        {
            Response.ContentType = "text/xml";
            System.Diagnostics.Debug.Print("<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\" ?>");
            System.Diagnostics.Debug.Print("<response>");
            string food = (string)Request.QueryString["food"];

            string[] foodArray = new string[] { "tuna", "beef", "mutton", "fish","biryani" };

            if (String.IsNullOrEmpty(food))
            {
                System.Diagnostics.Debug.Print("Enter a food you idiot.");
            }
            else 
            {
                if (foodArray.Contains(food))
                {
                    System.Diagnostics.Debug.Print("We serve " + food);
                }
                else 
                {
                    System.Diagnostics.Debug.Print("We do not serve " + food);
                }
            }

            System.Diagnostics.Debug.Print("</response>");

        }

注意：我已经尝试过而不是Print Response.Write，但结果与id = underInput得不到结果的div相同。有人在这里帮忙。

Answer 1

确保已使用Response.Write替换了所有System.Diagnostics.Debug.Print。然后，检查foodstore.aspx上的HTML标记。

Foodstore.aspx应该有@Page指令，但没有别的..你想要返回XML内容，所以你需要确保页面上没有DOCTYPE或HTML元素。

在asp.net中转换的PHP代码没有按预期工作？

1 个答案: