JSON HTML

JSON 非常易于转译为 JavaScript。

JavaScript 可用于在网页中生成 HTML。

HTML 表格

使用作为 JSON 接收到的数据来生成表格:

实例

obj = { "table":"customers", "limit":20 };
dbParam = JSON.stringify(obj);
xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
    if (this.readyState == 4  && this.status == 200) {
        myObj = JSON.parse(this.responseText);
         txt += "<table border='1'>"
        for (x in myObj) {
             txt += "<tr><td>" + myObj[x].name + "</td></tr>";
        }
        txt += "</table>" 
        document.getElementById("demo").innerHTML  = txt;
    }
}
xmlhttp.open("POST", "json_demo_db_post.php", true);
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlhttp.send("x=" + dbParam);

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动态 HTML 表格

使 HTML 表格基于下拉列表的值:选择一个选项: Customers Products Suppliers

实例

<select id="myselect" onchange="change_myselect(this.value)">
    <option value="">Choose an option:</option>
    <option value="customers">Customers</option>
    <option value="products">Products</option>
    <option value="suppliers">Suppliers</option>
</select>

<script>
function  change_myselect(sel) {
    var obj, dbParam, xmlhttp, myObj,  x, txt = "";
    obj = { "table":sel, "limit":20 };
     dbParam = JSON.stringify(obj);
    xmlhttp = new  XMLHttpRequest();
    xmlhttp.onreadystatechange =  function() {
        if (this.readyState  == 4 && this.status == 200) {
             myObj = JSON.parse(this.responseText);
             txt += "<table border='1'>"
             for (x in myObj) {
                 txt += "<tr><td>" + myObj[x].name + "</td></tr>";
             }
            txt +=  "</table>" 
             document.getElementById("demo").innerHTML = txt;
         }
    };
    xmlhttp.open("POST", "json_demo_db_post.php",  true);
    xmlhttp.setRequestHeader("Content-type",  "application/x-www-form-urlencoded");
    xmlhttp.send("x="  + dbParam);
}
</script>

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HTML 下拉列表

用接收到的 JSON 数据来生成 HTML 下拉列表:

实例

obj = { "table":"customers", "limit":20 };
dbParam = JSON.stringify(obj);
 xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
    if (this.readyState == 4  && this.status == 200) {
        myObj = JSON.parse(this.responseText);
         txt += "<select>"
        for (x in myObj) {
             txt += "<option>" + myObj[x].name;
        }
        txt += "</select>" 
        document.getElementById("demo").innerHTML  = txt;
    }
}
xmlhttp.open("POST", "json_demo_db_post.php", true);
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlhttp.send("x=" + dbParam);

亲自试一试

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