public static bool TryGetString(this JobDataMap map, string key, out string returnVal)
{
if (null == map)
{
throw new ArgumentNullException("map");
}
object output;
if (map.TryGetValue(key, out output))
{
returnVal = (output as string); // Try cast to string, if success returnVal is not null
// if cast failed, try calling ToString()
if (null == returnVal)
{
returnVal = (output == null) ? null : output.ToString();
}
return(returnVal != null);
}
else
{
returnVal = null;
return(false);
}
}
public static T GetAs <T>(this JobDataMap map, string key)
{
if (map is null)
{
throw new ArgumentNullException(nameof(map));
}
if (string.IsNullOrEmpty(key))
{
throw new ArgumentException($"“{nameof(key)}”不能是 Null 或为空。", nameof(key));
}
if (map.TryGetValue(key, out var oprovider) &&
oprovider is T provider)
{
return(provider);
}
return(default);
public static bool TryGetShort(this JobDataMap map, string key, out short returnVal)
{
if (null == map)
{
throw new ArgumentNullException("map");
}
object output;
if (map.TryGetValue(key, out output))
{
return(Int16.TryParse(Convert.ToString(output, CultureInfo.InvariantCulture), out returnVal));
}
else
{
returnVal = 0;
return(false);
}
}
public static bool TryGet <T>(this JobDataMap map, string key, out T returnVal) where T : class, new()
{
if (null == map)
{
throw new ArgumentNullException("map");
}
object output;
if (map.TryGetValue(key, out output))
{
returnVal = output as T;
return(returnVal != null);
}
else
{
returnVal = null;
return(false);
}
}
