Question

在ASP.NET MVC中，我在下面编写了代码，为文本框提供了一个初始值：

@Html.TextBoxFor(p => p.WEIGHT, new { tabindex = "140", 
                                      @class = "mustInputText noime  w50", 
                                      maxlength = "8", @Value = "0", 
                                      rule = "InputOnlyNum" })

Html源代码如下：

<input Value="0" class="mustInputText noime  w50" id="WEIGHT" maxlength="8" 
    name="WEIGHT" rule="InputOnlyNum" tabindex="140" type="text" value="" />

我注意到“input”标记中有两个Value属性： Value="0"和value=""

如何使它只显示一个值属性？

Answer 1

使用TextBox而不是TextBoxFor

@Html.TextBox("WEIGHT", Model.WEIGHT ?? "0", new {...})

或者如果WEIGHT是一个空字符串

@Html.TextBox("WEIGHT", Model.WEIGHT == "" ? "0" : Model.WEIGHT, new {...})

Answer 2

这似乎是默认行为。如果您真的想避免使用双值属性，最好通过在控制器类的create方法中设置默认值来遵循更清晰的方法。这遵循MVC模式的意识形态。

//GET
public ActionResult CreateNewEntity()
{
    YourEntity newEntity= new YourEntity ();
    newEntity.WEIGHT= 0;

    return View(newEntity);
}

然后在您的视图中，您将不再需要使用value属性：

@Html.TextBoxFor(p => p.WEIGHT, new { tabindex = "140", 
                                      @class = "mustInputText noime  w50",     
                                      maxlength = "8", 
                                      rule = "InputOnlyNum" })

您生成的HTML是：

<input class="mustInputText noime  w50" 
       id="WEIGHT" 
       maxlength="8" 
       name="WEIGHT" 
       rule="InputOnlyNum" 
       tabindex="140" 
       type="text" 
       value="0" />

Answer 3

您已明确声明Value，而不是value。

尝试：

 @Html.TextBoxFor(p => p.WEIGHT, new { tabindex = "140", @class = "mustInputText noime  w50", maxlength = "8", @value = "0", rule = "InputOnlyNum" })

Answer 4

未经测试，但请尝试TextBox而不是TextBoxFor，因为它有一个重载，可以将值作为第二个参数传递。

@Html.TextBox(p => p.WEIGHT, "0",
    new { tabindex = "140", @class = "mustInputText noime  w50", 
          maxlength = "8", @Value = "0", rule = "InputOnlyNum" })

另一个选项是在初始化WEIGHT的模型类的构造函数中设置默认值。

Answer 5

也许这个？未经测试。

@Html.TextBoxFor(p => (p.WEIGHT==null ? 0 : p.WEIGHT), new { tabindex = "140", 
      @class = "mustInputText noime  w50", 
      maxlength = "8",  
      rule = "InputOnlyNum" })

Answer 6

   @Html.TextBoxFor(p => p.WEIGHT, new { tabindex = "140", @class = "mustInputText noime  w50", maxlength = "8",
 @value =  model.WEIGHT==null?"0":model.WEIGHT, rule = "InputOnlyNum" })

ASP.NET MVC中TextBoxFor的默认值

6 个答案: