Question

function save() {

    var iframeID = $('iframe').attr('id');

    var code = lazyMethod_get(iframeID, "form1", "txt_code");
    var loa = lazyMethod_get(iframeID, "form1", "txt_loa");
    var DWT = lazyMethod_get(iframeID, "form1", "txt_dwt");
    var GrossTonnage = lazyMethod_get(iframeID, "form1", "txt_gross");

    if (code == '')
    {
        Ext.Msg.alert("Code need to be fill in!");
    }
    else if (loa == '')
    {
        Ext.Msg.alert("LOA need to be fill in!");
    }
    else if (DWT == '')
    {
        Ext.Msg.alert("DWT need to be fill in!");
    }
    else if (GrossTonnage == '')
    {
        Ext.Msg.alert("Gross Tonnage need to be fill in!");
    }
    else
    {
        validateDuplicate(name);
        this.up('window').close();  
    }
}

以上是我完成的代码，它会逐一提示。我需要它只验证一次，如果用户错过了2个文本框，它将提示错误一次，而不是两次。

Answer 1

您可以通过使用OR运算符来执行此操作，但在这种情况下，您的警报消息将是通用的。

function save() {

var iframeID = $('iframe').attr('id');


var code = lazyMethod_get(iframeID, "form1", "txt_code");
var loa = lazyMethod_get(iframeID, "form1", "txt_loa");
var DWT = lazyMethod_get(iframeID, "form1", "txt_dwt");
var GrossTonnage = lazyMethod_get(iframeID, "form1", "txt_gross");


if (code == ''|| loa == '' || DWT == '' || GrossTonnage == '') {

Ext.Msg.alert("You need to fill all the text field");
}

else {
validateDuplicate(name);

this.up('window').close();  
}
}

Answer 2

您可以在变量中附加错误，然后警告变量，而不是在每种情况下发出警报。

var errors=''; 
if (code == '') {

    errors+="Code need to be fill in!";
}   
if (loa == '') {

    errors+="LOA need to be fill in!";
}

在所有条件检查后是否有任何错误然后提醒

if(errors.length>0){
    Ext.Msg.alert(errors);
}

这是javascript示例。同样可以应用于C＃也

Answer 3

尝试if语句如下： if（x ==＆＃34;＆amp;＆amp; y ==＆＃34;＆amp;＆amp; z =＆＃34;） { //做东西 } 或者这个

import UIKit
import Foundation

class XyzTableViewCell: UITableViewCell
{
    @IBOutlet weak var phoneNumber: UILabel!
    var touchContact : String = ""

   var myCell: MyCellData! {
        didSet {
            self.updateUI()
        }
    }

    func updateUI()
    {
        touchContact = vicarCell.phone_no

        //Tap Gesture
        tapGestureAddonView()
    }

    //MARK:- Tap to Call and Open Email
    func tapGestureAddonView(){

        let contacttap = UITapGestureRecognizer(target: self, action:("contactTapped"))
        contacttap.numberOfTapsRequired = 1
        phoneNumber!.userInteractionEnabled = true
        phoneNumber!.addGestureRecognizer(contacttap)


    }

    func contactTapped() {
        // do something cool here

        print("contactTapped")
        print(touchContact)

        dispatch_async(dispatch_get_main_queue())
        {
        if UIApplication.sharedApplication().canOpenURL(NSURL(string: "telprompt://\(self.touchContact)")!){

            UIApplication.sharedApplication().openURL(NSURL(string: "telprompt://\(self.touchContact)")!)
        }
        else{
            //showAlert("Info",message: "Your device could not called" ,owner: self)
        }
        }
    }

如何在.NET中验证所有空文本

3 个答案: