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
根据下拉菜单的值生成 HTML 表格:
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_html_table.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_html_table.php", true);
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlhttp.send("x=" + dbParam);
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