c# - @onkeypress 没有获取文本输入框的更新值？

Question

我有以下代码。

<input id="search" type="text" @bind="Search" @onkeypress="SearchChanged" />
@code {
    string Search;

    void SearchChanged() 
    { 
        var s = Search; // Search is always one character behind
    }
}

在文本框中输入将触发函数 SearchChanged。但是，它得到的值始终是键入文本之前的一个字符。比如在SearchChanged中设置断点，

Typed Value of  Search
===== ================
a     null
ab    a
abc   ab
abcd  abc

BTW, the @onkeypress doesn't work in Internet Browser?

---

Tried to change the code to

<input id="search" type="text" @bind="Search" />
@code {
    string search;
    string Search 
    {
        get { return search; }
        set {
            search = value;
            ResultList = GetNewList(search).Result.ToList(); 
        }
    }

    void SearchChanged() 
    { 
        var s = Search; // Search is always one character behind
    }
}

我在 set { } 中设置了一个断点，但是，在输入文本框时，断点只命中了一两次？

Answer 1

您正在寻找@bind-value:event:

<input id="search" 
       type="text" 
       @bind-value="Search" 
       @bind-value:event="oninput"
/>

@code {
  string search;
  string Search 
  {
    get { return search; }
    set {
        search = value;
        ResultList = GetNewList(search).Result.ToList(); 
      }
  }

引用 Data Binding文档:

In addition to handling onchange events with @bind syntax, a property or field can be bound using other events by specifying an @bind-value attribute with an event parameter (@bind-value:event).