在按下提交之前，我收到了textboxfor string字段的验证消息，如何解决此问题？ [英] I receive a validation message for textboxfor string field before pressing submit, how to fix this?

问题描述

大家好。我正在研究一个c＃mvc应用程序。我在ViewModel中验证字符串属性为Required。以下是来自ViewModel的代码：



[必填（ErrorMessage =请输入数字。）]

[RegularExpression（ ^ [0-9] * $，ErrorMessage =请只输入一个数字而不是另一个符号。）]

public string BoardNumber {get;组; }



以下是视图中的代码：

< table style =background-color：rgba（224,95,3,0.18）; border-radius：8px;对齐= 中心 > 
< tr> 
< td> 
  BoardNumber： 
< p style =margin-left：20px; margin-right：20px;> 
 @ Html.TextBoxFor（x => x.BoardNumber，new {@class =form-control，@ Value =}）< br /> 
 @ Html.ValidationMessageFor（x => x.BoardNumber，，new {@class =bg-warning}）
 @ Html.ValidationMessage（error，，new { @class =bg-warning}）
< / p> 
< / td> 
< td> 
< p> 
< input type =submitstyle =margin-left：20px; margin-right：20px; margin-top：10px; value =提交class =btn btn-primary orders-search-button> 
< / p> 
< / td> 
< / tr> 
< / table> 

问题是当我转到视图时，甚至会显示所需的错误消息虽然我没有按提交，但我希望只有当我按提交并且没有输入任何内容时才显示它。我该怎么办呢？



我尝试过的事情：



我没有尝试任何东西，因为我不知道该怎么做。

解决方案

，ErrorMessage =请只输入一个不是另一个标志的数字。）]

公共字符串BoardNumber {get; set;}



以下是视图中的代码：

< table style =background-color：rgba（224,95,3,0.18）; border-radius：8px;align =center> 
< tr> 
< td> 
  BoardNumber： 
< p style =margin-left： 20像素; margin-right：20px;> 
 @ Html.TextBoxFor（x => x.BoardNumber，new {@class =form-control，@ Value =}）< br /> 
 @ Html.ValidationMessageFor（x => x.BoardNumber，，new {@class =bg-warning}）
 @ Html.ValidationMessage（error，，new { @class =bg-warning}）
< / p> 
< / td> 
< td> 
< p> 
< input type =submitstyle =margin-left：20px;保证金权：20px的; margin-top：10px;value =提交class =btn btn-primary orders-search-button> 
< / p> 
< / td> 
< ; / tr> 
< / table> 

问题是当我转到视图时，所需的错误即使我没有按提交，也会显示消息，我希望只有当我按下提交并且没有输入任何内容时才会显示。我该如何解决？



我尝试了什么：



我没有尝试任何东西，因为我不知道该怎么做。

添加两种不同的方法来查看和发布这样的表格



public ActionResult CreateSomething（）

{

返回视图（）;

}



[HttpPost]

公共ActionResult CreateSomething（Models.ModelName ModelName）

{



}

Hi, everyone. I am working on a c# mvc application. I validate a string property as Required in a ViewModel. Here is my code from the ViewModel:

[Required (ErrorMessage = "Please enter a number.")]
[RegularExpression("^[0-9]*$", ErrorMessage = "Please enter only a number not another sign.")]
public string BoardNumber { get; set; }

Here is the code from the View:

<table style="background-color:rgba(224, 95, 3, 0.18);border-radius:8px;" align="center">
        <tr>
            <td>
                BoardNumber:
                <p style="margin-left: 20px; margin-right:20px;">
                    @Html.TextBoxFor(x => x.BoardNumber, new { @class = "form-control" , @Value = "" }) <br />
                    @Html.ValidationMessageFor(x => x.BoardNumber, "", new { @class = "bg-warning" })
                    @Html.ValidationMessage("error", "", new { @class = "bg-warning" })
                </p>
            </td>
            <td>
                <p>
                    <input type="submit" style="margin-left: 20px; margin-right:20px; margin-top: 10px;" value="Submit" class="btn btn-primary orders-search-button">
                </p>
            </td>
        </tr>
    </table>

The problem is that when I go to the view, the required error message is shown even though I haven't pressed submit, and I want it to be displayed only if I press Submit and haven't entered anything. How should I fix that?

What I have tried:

I haven't tried anything because I don't know what to do.

解决方案

", ErrorMessage = "Please enter only a number not another sign.")]
public string BoardNumber { get; set; }

Here is the code from the View:

<table style="background-color:rgba(224, 95, 3, 0.18);border-radius:8px;" align="center">
        <tr>
            <td>
                BoardNumber:
                <p style="margin-left: 20px; margin-right:20px;">
                    @Html.TextBoxFor(x => x.BoardNumber, new { @class = "form-control" , @Value = "" }) <br />
                    @Html.ValidationMessageFor(x => x.BoardNumber, "", new { @class = "bg-warning" })
                    @Html.ValidationMessage("error", "", new { @class = "bg-warning" })
                </p>
            </td>
            <td>
                <p>
                    <input type="submit" style="margin-left: 20px; margin-right:20px; margin-top: 10px;" value="Submit" class="btn btn-primary orders-search-button">
                </p>
            </td>
        </tr>
    </table>

The problem is that when I go to the view, the required error message is shown even though I haven't pressed submit, and I want it to be displayed only if I press Submit and haven't entered anything. How should I fix that?

What I have tried:

I haven't tried anything because I don't know what to do.

add two different methods for viewing and posting form like this

public ActionResult CreateSomething()
{
return view();
}

[HttpPost]
public ActionResult CreateSomething(Models.ModelName ModelName)
{

}

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