Using linq query fetch dynamic property name

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Hell All

i am using

List<ExpandoObject>

but if we use linq that time i am not getting property

What I have tried:

<pre>  var grdfeatchobjlist = (List<ExpandoObject>)grdproductitem.ItemsSource;

var getlist = grdfeatchobjlist.Select(x => x.GetType().GetProperty("batchId") == Txtbatchcode.Text.ToString());

Posted 19-Apr-18 0:53am

Member 8735045

Updated 19-Apr-18 22:36pm

Bryian Tan

v2

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Richard Deeming · Answer 1 · 2018-04-19T09:44:00

Solution 1

If the property name is known at compile time, cast the ExpandoObject to dyanmic, and access the property directly:

C#

var getlist = grdfeatchobjlist.Select((dynamic x) => x.batchId == Txtbatchcode.Text);

For a dynamic property name which isn't known until runtime, cast the ExpandoObject to an IDictionary<string, object>, and use the indexer:

C#

var getlist = grdfeatchobjlist.Select((IDictionary<string, object> x) => x["batchId"] == Txtbatchcode.Text);

Posted 19-Apr-18 9:44am

Richard Deeming

Comments

Member 8735045 20-Apr-18 2:37am

Thank's for comment Richard , i try to use this

Member 8735045 20-Apr-18 4:36am

I want to this ,
thanks Richard.

var grdfeatchobjlist =grdproductitem.ItemsSource.OfType<expandoobject>().Select((dynamic x) => x);

long StockId = Convert.ToInt64(stockId.Text);

(from u in grdfeatchobjlist where u.stockId == StockId select u).ToList()
.ForEach(u => {
u.newExpiryDate = Convert.ToDateTime(Txtexpierydate.Text).ToString("yyyy-MM-dd");
u.newSaleRate = Txtnewretailmerp.Text;
u.newMrp = Txtnewretailmerp.Text;
u.purchaseRate = Txtnewpurchasemrp.Text;
u.Status = "Yes";
u.createdby = LoginUserDetails.loginUserName.ToString();

});

Member 8735045 20-Apr-18 5:18am

if
var datalist = JsonConvert.DeserializeObject<List<expandoobject>>(jsonResult, converter);
object is property value is null that time ExpandoObject can not be DeserializeObject

what we are missing

Richard Deeming 20-Apr-18 7:06am

Assuming converter is an instance of the ExpandoObjectConverter class, that code should work. Make sure the property exists in your JSON data, and that you've matched the case of the property correctly.

(Eg: stockId is not the same as StockId or stockID.)

Member 8735045 20-Apr-18 7:52am

This is my json
{
"orgId": 1,
"oprId": 1,
"productCode": 143654,
"stockId": 122104,
"batchId": 122104,
"rateId": 122104,
"shortName": "SME",
"batchNo": "150419",
"expiryDate": "2022-05-28",
"mrp": 60.0,
"saleRate": 60.0,
"purchaseRate": 13.74,
"quantity": 500.0,
"storeName": "Main Store",
"newMrp": null,
"newSaleRate": null,
"newExpiryDate": null,
"newShortName": null,
"createdby": null,
"status": null
}
But only get not null value like "mrp": 60.0, "saleRate": 60.0
and "newSaleRate": null, this are not convert

Richard Deeming 20-Apr-18 8:02am

That JSON is a single object, not a list of objects.

Deserializing that JSON to a single ExpandoObject includes all of the null properties as expected.

Member 8735045 21-Apr-18 7:31am

Multiple list of json

{
"orgId": 1,
"oprId": 1,
"productCode": 143654,
"stockId": 122104,
"batchId": 122104,
"rateId": 122104,
"shortName": "SME",
"batchNo": "150419",
"expiryDate": "2022-05-28",
"mrp": 60.0,
"saleRate": 60.0,
"purchaseRate": 13.74,
"quantity": 500.0,
"storeName": "Main Store",
"newMrp": null,
"newSaleRate": null,
"newExpiryDate": null,
"newShortName": null,
"createdby": null,
"status": null
},
{
"orgId": 1,
"oprId": 1,
"productCode": 143654,
"stockId": 2018030010140000053,
"batchId": 2018030010200000033,
"rateId": 122104,
"shortName": null,
"batchNo": "220",
"expiryDate": null,
"mrp": 60.0,
"saleRate": 0.0,
"purchaseRate": 13.74,
"quantity": 10.0,
"storeName": null,
"newMrp": null,
"newSaleRate": null,
"newExpiryDate": null,
"newShortName": null,
"createdby": null,
"status": null
},

I use
var jsonSettings = new JsonSerializerSettings()
{
DefaultValueHandling = DefaultValueHandling.Ignore,
Formatting = Newtonsoft.Json.Formatting.Indented,
TypeNameHandling = TypeNameHandling.All,
NullValueHandling = NullValueHandling.Include

};
but problem still remain
i trying my best
thanks for reply

Richard Deeming 21-Apr-18 11:43am

After adding the missing [ and ] characters to your JSON, and adding the ExpandoObjectConverter instance to the jsonSettings.Converters list, the code still deserializes the list with the correct null property values.

var jsonSettings = new JsonSerializerSettings()
{
	DefaultValueHandling = DefaultValueHandling.Ignore,
	Formatting = Newtonsoft.Json.Formatting.Indented,
	TypeNameHandling = TypeNameHandling.All,
	NullValueHandling = NullValueHandling.Include,
	Converters = { new ExpandoObjectConverter() }
};

var dataList = JsonConvert.DeserializeObject<List<ExpandoObject>>(jsonResult, jsonSettings);

Here's a demo of the code executing: .NET Fiddle[^]

Member 8735045 23-Apr-18 7:21am

Thank's Richard
i checked result in my side and i am getting result proper in Result View,
if you checked both Result View and Dynamic View, i am not able to getting newShortName in Dynamic Vewi. i think Dynamic Vewi has been bind to the
grdproductitem.ItemsSource = dataList ;
that's why newShortName propert can't be created after JsonConvert.DeserializeObject<>