首页 / 网页编程 / ASP.NET / asp.net两级联动（包含添加和修改）

<script language="javascript" type="text/javascript">
//科目数据初始化
var subcat = new Array（）;
subcat[0] = new Array（"0", "请选择科目", "0"）;
subcat[1] = new Array（"x1", "语文", "x1yw"）;
subcat[2] = new Array（"x2", "语文", "x2yw"）;
subcat[3] = new Array（"x3", "语文", "x3yw"）;
subcat[4] = new Array（"x4", "语文", "x4yw"）;
subcat[5] = new Array（"x5", "语文", "x5yw"）;
subcat[6] = new Array（"x6", "语文", "x6yw"）;
subcat[7] = new Array（"c5", "语文", "c5yw"）;
subcat[8] = new Array（"c6", "语文", "c6yw"）;
subcat[9] = new Array（"c7", "语文", "c7yw"）;
subcat[10] = new Array（"g1", "语文", "g1yw"）;
subcat[11] = new Array（"g3", "语文", "g3yw"）;
subcat[12] = new Array（"g4", "语文", "g4yw"）;
subcat[13] = new Array（"x1", "数学", "x1sx"）;
subcat[14] = new Array（"x2", "数学", "x2sx"）;
subcat[15] = new Array（"x3", "数学", "x3sx"）;
subcat[16] = new Array（"x4", "数学", "x4sx"）;
subcat[17] = new Array（"x5", "数学", "x5sx"）;
subcat[18] = new Array（"x6", "数学", "x6sx"）;
subcat[19] = new Array（"c5", "数学", "c5sx"）;
subcat[20] = new Array（"c6", "数学", "c6sx"）;
subcat[21] = new Array（"c7", "数学", "c7sx"）;
subcat[22] = new Array（"g1", "数学", "g1sx"）;
subcat[23] = new Array（"g3", "数学", "g3sx"）;
subcat[24] = new Array（"g4", "数学", "g4sx"）;
subcat[25] = new Array（"x1", "英语", "x1yy"）;
subcat[26] = new Array（"x2", "英语", "x2yy"）;
subcat[27] = new Array（"x3", "英语", "x3yy"）;
subcat[28] = new Array（"x4", "英语", "x4yy"）;
subcat[29] = new Array（"x5", "英语", "x5yy"）;
subcat[30] = new Array（"x6", "英语", "x6yy"）;
subcat[31] = new Array（"c5", "英语", "c5yy"）;
subcat[32] = new Array（"c6", "英语", "c6yy"）;
subcat[33] = new Array（"c7", "英语", "c7yy"）;
subcat[34] = new Array（"g1", "英语", "g1yy"）;
subcat[35] = new Array（"g3", "英语", "g3yy"）;
subcat[36] = new Array（"g4", "英语", "g4yy"）;
subcat[37] = new Array（"c5", "物理", "c5wl"）;
subcat[38] = new Array（"c6", "物理", "c6wl"）;
subcat[39] = new Array（"c7", "物理", "c7wl"）;
subcat[40] = new Array（"g1", "物理", "g1wl"）;
subcat[41] = new Array（"g3", "物理", "g3wl"）;
subcat[42] = new Array（"g4", "物理", "g4wl"）;
subcat[43] = new Array（"c5", "化学", "c5hx"）;
subcat[44] = new Array（"c6", "化学", "c6hx"）;
subcat[45] = new Array（"c7", "化学", "c7hx"）;
subcat[46] = new Array（"g1", "化学", "g1hx"）;
subcat[47] = new Array（"g3", "化学", "g3hx"）;
subcat[48] = new Array（"g4", "化学", "g4hx"）;
subcat[49] = new Array（"c5", "政治", "c5zz"）;
subcat[50] = new Array（"c6", "政治", "c6zz"）;
subcat[51] = new Array（"c7", "政治", "c7zz"）;
subcat[52] = new Array（"g1", "政治", "g1zz"）;
subcat[53] = new Array（"g3", "政治", "g3zz"）;
subcat[54] = new Array（"g4", "政治", "g4zz"）;
subcat[55] = new Array（"c5", "历史", "c5ls"）;
subcat[56] = new Array（"c6", "历史", "c6ls"）;
subcat[57] = new Array（"c7", "历史", "c7ls"）;
subcat[58] = new Array（"g1", "历史", "g1ls"）;
subcat[59] = new Array（"g3", "历史", "g3ls"）;
subcat[60] = new Array（"g4", "历史", "g4ls"）;
subcat[61] = new Array（"c5", "生物", "c5sw"）;
subcat[62] = new Array（"c6", "生物", "c6sw"）;
subcat[63] = new Array（"c7", "生物", "c7sw"）;
subcat[64] = new Array（"g1", "生物", "g1sw"）;
subcat[65] = new Array（"g3", "生物", "g3sw"）;
subcat[66] = new Array（"g4", "生物", "g4sw"）;
subcat[67] = new Array（"c5", "地理", "c5dl"）;
subcat[68] = new Array（"c6", "地理", "c6dl"）;
subcat[69] = new Array（"c7", "地理", "c7dl"）;
subcat[70] = new Array（"g1", "地理", "g1dl"）;
subcat[71] = new Array（"g3", "地理", "g3dl"）;
subcat[72] = new Array（"g4", "地理", "g4dl"）;
subcat[73] = new Array（"x1", "其它", "x1qt"）;
subcat[74] = new Array（"x2", "其它", "x2qt"）;
subcat[75] = new Array（"x3", "其它", "x3qt"）;
subcat[76] = new Array（"x4", "其它", "x4qt"）;
subcat[77] = new Array（"x5", "其它", "x5qt"）;
subcat[78] = new Array（"x6", "其它", "x6qt"）;
subcat[79] = new Array（"c5", "其它", "c5qt"）;
subcat[80] = new Array（"c6", "其它", "c6qt"）;
subcat[81] = new Array（"c7", "其它", "c7qt"）;
subcat[82] = new Array（"g1", "其它", "g1qt"）;
subcat[83] = new Array（"g3", "其它", "g3qt"）;
subcat[84] = new Array（"g4", "其它", "g4qt"）;
//选择年级
function ChangeGrade（obj,id）
{
var oObj = document.getElementById（id）;
oObj.length = 0;
for（i=0; i<subcat.length; i++）
{
if（subcat[i][0] == obj）
{
oObj.options[oObj.length] = new Option（subcat[i][1], subcat[i][2]）;
}
}
}
//修改页面科目数据加载
function LoadingCourse（）
{
var SubjectSelect = "<%=SubjectSelect %>";
var GradeSelect = "<%=GradeSelect %>";
if（SubjectSelect ！= ""）
{
LoadingSubject（GradeSelect, "Course", SubjectSelect）;
}
}
function LoadingSubject（obj,id, sid）
{
var slt = document.forms[0].elements["id"];
var oObj = document.getElementById（id）;
oObj.length = 0;
oObj.options[0] = new Option（"全部科目", "0"）;
for（i=0; i<subcat.length; i++）
{
if（subcat[i][0] == obj）
{
oObj.options[oObj.length] = new Option（subcat[i][1], subcat[i][2]）;
if（subcat[i][2] == sid）
{
oObj.options[oObj.length-1].selected = true;
}
}
}
}
</script>
<body onload="LoadingCourse（）;">
<select name="Grade" id="Grade" class="input" onchange="ChangeGrade（this.value,"Course"）">
<option value="0">请选择年级</option>
<option value="x1" <%=GradeSelect == "x1" ？ "selected":"" %>>一年级</option>
<option value="x2" <%=GradeSelect == "x2" ？ "selected":"" %>>二年级</option>
<option value="x3" <%=GradeSelect == "x3" ？ "selected":"" %>>三年级</option>
<option value="x4" <%=GradeSelect == "x4" ？ "selected":"" %>>四年级</option>
<option value="x5" <%=GradeSelect == "x5" ？ "selected":"" %>>五年级</option>
<option value="x6" <%=GradeSelect == "x6" ？ "selected":"" %>>六年级</option>
<option value="c5" <%=GradeSelect == "c5" ？ "selected":"" %>>七年级</option>
<option value="c6" <%=GradeSelect == "c6" ？ "selected":"" %>>八年级</option>
<option value="c7" <%=GradeSelect == "c7" ？ "selected":"" %>>九年级</option>
<option value="g1" <%=GradeSelect == "g1" ？ "selected":"" %>>高一</option>
<option value="g3" <%=GradeSelect == "g3" ？ "selected":"" %>>高二</option>
<option value="g4" <%=GradeSelect == "g4" ？ "selected":"" %>>高三</option>
</select>
<select name="Course" id="Course" class="input">
<option value="0">请选择年级</option>
</select>
</body>
//C#代码
protected void Page_Load（object sender, System.EventArgs e）
{
public string GradeSelect = String.Empty;
public string SubjectSelect = String.Empty;
if （！（IsPostBack））
{
GradeSelect = Request.QueryString["Grade"];
SubjectSelect = Request.QueryString["Course"];
}
}