[英]How to validate textbox with checkbox in MVC?
我有這個ViewModel
:
public string Address { get; set; }
[DisplayName("Do you want Reward?")]
public bool IsReward { get; set; }
[Range(0,int.MaxValue,ErrorMessage="Please enter integer number")]
[DisplayName("Reward")]
public int Reward { get; set; }
在“視圖IsReward
屬性中,默認情況下未選中IsReward
屬性,當用戶選中“ Isreward
並發布視圖時,如果“ Reward
文本框為空,則向用戶顯示錯誤消息“請輸入獎勵”。
如何使用DataAnnotation
驗證它?
請嘗試以下代碼。 如果IsReward
為true並且Reward
文本框值為零,它將顯示錯誤消息。
[RewardValidation]
public class RewardModel
{
public string Address { get; set; }
[DisplayName("Do you want Reward ؟")]
public bool IsReward { get; set; }
[Range(0, int.MaxValue, ErrorMessage = "Please enter integer number")]
[DisplayName("Reward")]
public int Reward { get; set; }
}
public class RewardValidation : ValidationAttribute
{
public override bool IsValid(object value)
{
RewardModel app = value as RewardModel;
if (app.IsReward && app.Reward==0)
{
ErrorMessage = "please enter Reward";
return false;
}
return true;
}
}
並在視圖中包含@Html.ValidationSummary(true)
以顯示消息
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