验证器在回发发生后不进行验证 [英] Validators do not Validate after postback occurs

问题描述

我找到了问题的根源，我没有很好地解释它.

I found the source of the issue i did not explain it very well.

基本上我有一个带有比较验证器的表单，可确保我的 txtstartdate 不小于我的 txtenddate.所以这 2 个文本框附有 ajax 日历，当我选择那 2 个时，我的比较验证器出现并给出错误.

Basically i have a form with a compare validator that makes sure my txtstartdate is not less than my txtenddate. So these 2 text boxes have ajax calendar attached to it and when I select those 2 my compare validator appears and gives an error.

然后我有 2 个下拉列表 ddlroom，ddlnumber.ddlroom 启用了自动回发，所以如果我在开始日期之前错误地填充我的日历，比较验证器会触发比较验证器，但是第二次我选择一个房间名称，自动回​​发发生并且验证器消失，我可以单击插入按钮，它将插入任何日期在没有验证的文本框中.希望能解释的好一点抱歉

Then i have 2 dropdownlist ddlroom, ddlnumber. ddlroom has autopostback enabled so if i populate my calendar incorrectly having my endate before startdate the comparevalidator fires however the second i select a roomname the autopostback occurs and the validator dissapears and I am able to click the insert button and it will insert what ever date is in the textboxes without validating. Hope that explains a little better sorry

推荐答案

如果您希望在 DropDownList 执行回发时触发验证，请确保在 DropDownList 上设置 CausesValidation="true".

If you want validation to fire when your DropDownList does a postback then be sure to set CausesValidation="true" on the DropDownList.

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