我在一个网格视图中有下拉和文本框,我正在尝试检查下拉列表的选定值是否设置为“否”,并且在文本框中没有输入注释,然后我想显示消息。只要下拉列表的选定值设置为No,则要求必须在文本框中输入注释。我的问题是,即使下拉设置为“是”,或者当下拉设置为“否”时提供注释,我仍将收到消息。以下是代码:
function validate() {
var flag = false;
var gridView = document.getElementById('<%= GridView1.ClientID %>');
for (var i = 1; i < gridView.rows.length; i++) {
var ddl = gridView.rows[i].getElementsByTagName('Select');
var areas = gridView.rows[i].getElementsByTagName('textarea');
if (ddl != null && ddl.length > 1 && ddl[0] != null && areas != null && areas.length > 1 && areas[0] != null) {
if (areas[0].type == "textarea" && ddl[0].type == "select-one") {
var txtval = areas[0].value;
var txtddl = ddl[0].value;
if (txtddl.value == "No" && (txtval == "" || txtval == null)) {
flag = false;
break;
}
else {
flag = true
}
}
}
}
if (!flag) {
alert('Please note that comments is required if drop down is set to No. Thanks');
areas[i].focus();
}
return flag;
}
</script>
发布于 2014-01-19 18:00:09
你可以这样做:
<script>
function validate() {
var flag = false;
var gridView = document.getElementById('<%= GridView1.ClientID %>');
for (var i = 1; i < gridView.rows.length; i++) {
var selects = gridView.rows[i].getElementsByTagName('select');
//var inputs = gridView.rows[i].getElementsByTagName('input');
var areas = gridView.rows[i].getElementsByTagName('textarea');
if (selects != null && areas != null) {
if (areas[0].type == "textarea") {
var txtval = areas[0].value;
var selectval = selects[0].value;
if (selectval == "No" && (txtval == "" || txtval == null)) {
flag = false;
break;
}
else {
flag = true;
}
}
}
}
if (!flag) {
alert('Please enter comments. Thanks');
}
return flag;
}
</script>
发布于 2014-01-19 17:41:51
试试这个:
$('#select').on('change', function () {
var text = $(this).find(":selected").text();
var textBox = $(this).parent().filter('input [name="InputName"]');
if(text == "no" && textBox.val() =="")
{
\\display your message
}
});
https://stackoverflow.com/questions/21220133
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