如何动态验证创建的控制？ [英] How to validate dynamically created control?

问题描述

我有一个asp.net页面，它的一些控制是动态创建的，这些控件是以下中的一个;文本框，日历，或DropDownList的。

在某些情况下，这些控制，应根据标志从数据库读取验证？

  

有什么办法来验证   动态创建控件？

解决方案

我得到了该问题的解决方案。 其中一个是我和这个页面，它的Ajax功能的主要问题，我需要验证动态创建的控件。

我的解决方案，并能正常工作，同时创造了控制，我添加了一个输入属性，其市场上赢得它，因为它需要与否，而且标志着其另一属性，因为它是一个字段被验证或不？

使用JavaScript，我通过所有的输入标签与属性的动态控制，并根据验证attribut，我确认这一点。简单吧？

样品code： 而对照创建，标志着它像下面的

  txtBox.Attributes.Add（类型，T）; //控制类型。
txtBox.Attributes.Add（IsKeyField，Y）; //动态创建领域。
txtBox.Attributes.Add（IsMandatory，Y）; //是强制性的还是不？
 

JavaScript的code

  VAR inputControls = document.getElementsByTagName（输入）;
            对于（VAR I = 0; I＆LT; inputControls.length;我++）
            {
                如果（inputControls [I] .getAttribute（IsKeyField）==Y）
                {
                    如果（inputControls [I] .getAttribute（类型）==T||（inputControls [I] .getAttribute（类型）==C））
                    {
                        如果（inputControls [I] .getAttribute（IsMandatory）==Y）
                        {
                            如果（inputControls [I] .value的==）
                            {
                                ERRORMSG + =\ N+ inputControls [I] .getAttribute（KeyField_Name）+是必需的。
                                isValidated = FALSE;
                            }
                        }
                    }
                }
            }
 

当然，你可以调用code点击所需要的按钮时。

  btnUpload.Attributes.Add（onclick事件，JavaScript的：如果（ValidateMandatoryFields（））返回false;！）;
 

I have an asp.net page, some of its controls are created dynamically, these controls are one of the following; textbox, calendar, or dropdownlist.

These controls in some cases, should be validated based on flag read from db?

Is there any way to validate dynamically created controls?

解决方案

I got a solution for that problem. One of the main problems that I had with this page that it's ajax-enabled and I need to validate dynamically created controls.

My solution and it works properly, while creating the Control, I added an input attribute to it markes it as it is required or not, and another attribute that marks it as it is a field to be validated or not?

Using Javascript, I go through all input tags with attribute "dynamic control" and based on "to validate attribut", I validate it or not. Simple, right?

Sample Code: While control creating, mark it like the following

txtBox.Attributes.Add("Type", "T"); // Type of control.
txtBox.Attributes.Add("IsKeyField", "Y"); // Is dynamically created field.
txtBox.Attributes.Add("IsMandatory", "Y");  // Is mandatory or not?

JavaScript code

            var inputControls = document.getElementsByTagName("input");
            for(var i=0 ; i<inputControls.length ; i++)
            {
                if ( inputControls[i].getAttribute("IsKeyField") == "Y" )                                        
                {
                    if (inputControls[i].getAttribute("Type") == "T" || (inputControls[i].getAttribute("Type") == "C"))
                    {
                        if(inputControls[i].getAttribute("IsMandatory") == "Y")
                        {
                            if(inputControls[i].value == "")
                            {
                                errorMsg += "\n" + inputControls[i].getAttribute("KeyField_Name") + " is required.";
                                isValidated = false;
                            }                            
                        }                         
                    }
                }
            }

Of course, you can call that code while clicking the required button.

btnUpload.Attributes.Add("onClick", "javascript:if(!ValidateMandatoryFields()) return false;");

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