LINQ to Entities does not recognize the method 'Int32 ToInt32(System.String)' method, and this method cannot be translated into a store expression

if (!string.IsNullOrEmpty(FarmWorkId))
{
data = data.Where(p => p.TypeId == Convert.ToInt32(FarmWorkId));
}

 

解决方法：

if (!string.IsNullOrEmpty(FarmWorkId))
{
int i = Convert.ToInt32(FarmWorkId);
data = data.Where(p => p.TypeId == i);
}