对于 Blazor Webassembly 中的 EditForm,是否存在与 Angular 中的脏表单概念等效的概念?我想显示一个文本“您已经进行了更改。任何未保存的更改都将丢失!”向用户表明某些内容尚未保存,离开前应点击提交按钮。
最佳答案
是的,有,但我们不使用脏话,我们使用修改或未修改。
EditContext 类提供以下内容:
/// <summary>
/// Determines whether any of the fields in this <see cref="EditContext"/> have been modified.
/// </summary>
/// <returns>True if any of the fields in this <see cref="EditContext"/> have been modified; otherwise false.</returns>
public bool IsModified()
{
// If necessary, we could consider caching the overall "is modified" state and only recomputing
// when there's a call to NotifyFieldModified/NotifyFieldUnmodified
foreach (var state in _fieldStates)
{
if (state.Value.IsModified)
{
return true;
}
}
return false;
}
/// <summary>
/// Determines whether the specified fields in this <see cref="EditContext"/> has been modified.
/// </summary>
/// <returns>True if the field has been modified; otherwise false.</returns>
public bool IsModified(in FieldIdentifier fieldIdentifier)
=> _fieldStates.TryGetValue(fieldIdentifier, out var state)
? state.IsModified
: false;
/// <summary>
/// Determines whether the specified fields in this <see cref="EditContext"/> has been modified.
/// </summary>
/// <param name="accessor">Identifies the field whose current validation messages should be returned.</param>
/// <returns>True if the field has been modified; otherwise false.</returns>
public bool IsModified(Expression<Func<object>> accessor)
=> IsModified(FieldIdentifier.Create(accessor));
关于blazor - 如果 Blazor webassembly 中的 EditForm 组件为 "dirty",如何捕获,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60328796/