处理元素列表时处理NullReferenceException(Handle NullReferenceException when processing a list of elements)

 在当前场景中，我正在填充列表但是当我转到ItemsinList ，许多值将为null ，并且您可以看到我试图控制字符串null值但它给了我错误。 当我在代码的列表行上填充数据源时，它会将Object reference not set to an instance of an object的错误Object reference not set to an instance of an object 。 我已经尝试过IsNullOrEmpty ， Equals(string.Empty)并将其默认值设为null但它仍然会中断。 我的问题是如何处理空值？ 
 
var items = CommonList.ItemList();
items.Insert(0,new DataModel.SKU(){SKUID = 0,SKUName = "abc" });
var itemsinlist = from obj in items
                  select new { obj.SKUID, obj.SKUName,string.IsNullOrEmpty(obj.SKUCode), 
                      obj.SalePrice, obj.PurchasePrice, obj.CostPrice, 
                      // if is null the code breaks 
                      obj.BaseUnit.UnitName, obj.SKUGroup.SKUGroupName,
                      obj.SKUBrand.SKUBrandName, obj.Unit_Weight };

var objlist = itemsinlist as IEnumerable<dynamic>;
// can not add list if some value is null althought the db value can be null
this.cmbSKU.ValueMember = "SKUID";
this.cmbSKU.DisplayMember = "SKUName";
this.cmbSKU.DataSource = itemsinlist.ToList();

In the current scenario I’m filling the list but when I go to the ItemsinList, many of the value will be null and as you can see I tried to control the string null value but it gives me the error. As I fill the data source on the list line of the code it gives the error of Object reference not set to an instance of an object. I’d already tried IsNullOrEmpty, Equals(string.Empty) and given it default value as null but its still breaks. My question is how can I handle the null values?
 
var items = CommonList.ItemList();
items.Insert(0,new DataModel.SKU(){SKUID = 0,SKUName = "abc" });
var itemsinlist = from obj in items
                  select new { obj.SKUID, obj.SKUName,string.IsNullOrEmpty(obj.SKUCode), 
                      obj.SalePrice, obj.PurchasePrice, obj.CostPrice, 
                      // if is null the code breaks 
                      obj.BaseUnit.UnitName, obj.SKUGroup.SKUGroupName,
                      obj.SKUBrand.SKUBrandName, obj.Unit_Weight };

var objlist = itemsinlist as IEnumerable<dynamic>;
// can not add list if some value is null althought the db value can be null
this.cmbSKU.ValueMember = "SKUID";
this.cmbSKU.DisplayMember = "SKUName";
this.cmbSKU.DataSource = itemsinlist.ToList();

原文：https://stackoverflow.com/questions/34219308