数据输入后修剪字符串的最佳方法.我应该创建自定义模型活页夹吗? [英] Best way to trim strings after data entry. Should I create a custom model binder?

问题描述

我正在使用ASP.NET MVC，我希望在将所有用户输入的字符串字段插入数据库之前先对其进行修剪.由于我有许多数据输入表单，因此我正在寻找一种修整所有字符串的方法，而不是显式修整每个用户提供的字符串值.我很想知道人们如何以及何时修剪字符串.

I'm using ASP.NET MVC and I'd like all user entered string fields to be trimmed before they're inserted into the database. And since I have many data entry forms, I'm looking for an elegant way to trim all strings instead of explicitly trimming every user supplied string value. I'm interested to know how and when people are trimming strings.

我考虑过可能要创建一个自定义模型联编程序并在那里修剪任何字符串值...那样，我所有的修剪逻辑都包含在一个地方.这是一个好方法吗?有没有执行此操作的代码示例?

I thought about perhaps creating a custom model binder and trimming any string values there...that way, all my trimming logic is contained in one place. Is this a good approach? Are there any code samples that do this?

推荐答案

  public class TrimModelBinder : DefaultModelBinder
  {
    protected override void SetProperty(ControllerContext controllerContext, 
      ModelBindingContext bindingContext, 
      System.ComponentModel.PropertyDescriptor propertyDescriptor, object value)
    {
      if (propertyDescriptor.PropertyType == typeof(string))
      {
        var stringValue = (string)value;
        if (!string.IsNullOrWhiteSpace(stringValue))
        {
          value = stringValue.Trim();
        }
        else
        {
          value = null;
        }
      }

      base.SetProperty(controllerContext, bindingContext, 
                          propertyDescriptor, value);
    }
  }

该代码怎么样?

ModelBinders.Binders.DefaultBinder = new TrimModelBinder();

设置global.asax Application_Start事件.

Set global.asax Application_Start event.

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