/// <summary>
/// 根据名称返回参数值。
/// </summary>
/// <param name="provider"></param>
/// <param name="key">参数名称。</param>
/// <param name="format">用于 DateTime 格式化的字符串。</param>
/// <returns></returns>
public static DateTime?GetNullableDateTime(
this IParamProvider provider, string key, string format)
{
var s = provider.GetString(key);
if (!string.IsNullOrEmpty(s))
{
return(DateTime.ParseExact(s, format, null));
}
else
{
return(null);
}
}
/// <summary>
/// 根据名称返回参数值。
/// </summary>
/// <param name="provider"></param>
/// <param name="key">参数名称。</param>
/// <param name="default">参数值为 Null 时返回的默认值。</param>
/// <returns></returns>
public static int GetInt32(this IParamProvider provider,
string key, int @default = 0)
{
var s = provider.GetString(key);
int ret;
if (int.TryParse(s, out ret))
{
return(ret);
}
else
{
return(@default);
}
}
/// <summary>
/// 根据名称返回参数值。
/// </summary>
/// <param name="provider"></param>
/// <param name="key">参数名称。</param>
/// <returns></returns>
public static double?GetNullableDouble(
this IParamProvider provider, string key)
{
var s = provider.GetString(key);
double ret;
if (double.TryParse(s, out ret))
{
return(ret);
}
else
{
return(null);
}
}
/// <summary>
/// 校验请求。
/// </summary>
/// <param name="provider">待校验的请求。</param>
/// <exception cref="Alipay.Validators.RequiredParameterNotExistException">如果缺少必需参数则抛出异常。</exception>
public void Validate(IParamProvider provider)
{
var requiredAttrs = this.GetRequiredAttributes(provider);
foreach (RequiredAttribute required in requiredAttrs)
{
if (string.IsNullOrEmpty(provider.GetString(required.Key)))
{
throw new RequiredParameterNotExistException
{
Provider = provider,
Key = required.Key,
};
}
}
}