FlowPortal-BPM——功能：判断数据库表中字段是否重复并阻止提交或保存

一、JS添加代码，判断是否有OnSubmit事件

文件位置：YZSoft/Forms/src/Validator.js

//=====判断是否有OnSubmit事件=====
        if (typeof (OnSubmit) != 'undefined')
        {
            var func = OnSubmit;
            if (func(validationGroup) === false)
                return false;
        }

二、OnSubmit方法

代码位置：需要判断的表单中

<script>
    function OnSubmit() { 
        
        var PID = $("#XTextBox2").find(".yz-xform-field-ele-input").val();
        var a = true;
        
        $.ajax({
            url: "../合同管理/CollectionManagement.ashx",
            data: { "PID": PID },
            type: "post",
            dataType: "text",
            async: false,    //异步：关闭（将异步变为同步）
            success: function (data) {
                if (data=="false") {
                    alert("工程编号已存在！请重新输入！");
                    a = false;
                }
            }
        });
       return a;
    }


</script>

三、ajax一般处理程序

<%@ WebHandler Language="C#" Class="CollectionManagement" %>

using System;
using System.Web;
using System.Linq;
using System.Collections.Generic;
using System.Collections;

public class CollectionManagement : IHttpHandler {

    
    public void ProcessRequest (HttpContext context) {
        
        string PID=context.Request["PID"];
        //PID = "GC422444";
        //string json = "{"P":"F"}";
        string flag = "true";
        using (CollectionManagementDataClassesDataContext cm = new CollectionManagementDataClassesDataContext())
        {
            List<EngineeringManagement> P = cm.EngineeringManagement.Where(r => r.ProjectID == PID).ToList();
            if (P.Count != 0)
            {
                flag = "false";
            }
        }

        context.Response.Write(flag);
        context.Response.End();
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
    

}