Blazor 循环的迷思

Steps列表有9条记录，循环9次总是出错，写i<8就没问题，百思不得其解

 然后 改成这样，循环steps.count-1次，然后第最后一个元素再copy一次html，就不报错

然后网友提示

for里面要临时变量，for里面要临时变量，var index=i， 或者foreach

 

 

 

 

<PropertyColumn Width="30%" Property="c=>c.Name" Title="期望日期">
<DatePicker @bind-Value="@ParseFileExtension(context.Extension).ExpectDate"
TValue="DateTime" Format="yyyy-MM-dd" Mask="yyyy-MM-dd" Placeholder="@("yyyy-MM-dd")" Style="width:100%;" OnChange="@(e => HandleDateChange(context, e))" />
</PropertyColumn>
<PropertyColumn Width="30%" Property="c=>c.Name" Title="延迟日期">
<Input TValue="int" Type="text" @bind-Value="ParseFileExtension(context.Extension).DelayDays" OnChange="@(e => HandleInputChange(context, e))" />
</PropertyColumn>

 

 

private string inputValue;
private void HandleInputChange(SysFile context,int value)
{
// 更新 inputValue 的值
inputValue = value.ToString();

context.Extension = "{\"ExpectDate\":\""+ ParseFileExtension(context.Extension).ExpectDate +"\",\"DelayDays\":\""+ inputValue +"\"}";
Console.WriteLine($"Input changed to: {inputValue}");
}
private void HandleDateChange(SysFile context, DateTimeChangedEventArgs<DateTime> e)
{
Console.WriteLine("OnDateChange:" + e.DateString);
context.Extension = "{\"ExpectDate\":\"" + e.DateString + "\",\"DelayDays\":\"" + ParseFileExtension(context.Extension).DelayDays + "\"}";
Console.WriteLine($"Input changed to: {inputValue}");

}