Develop Reference

C# deserialize JSON without custom class into Dictionary or DataTable

from an API I get a json like this:
66 results of an player with somewhat 31 attributes containing single values or an array of values.
{"api":
{"results":66,
"players":
[{
"player_id":10,
"player_name":"Gustavo Ferrareis",
... (some 31 stats)
"shots":{
"total":13,
"on":2
},
...
},
"player_id":21,
...
}]
}
And I wanted to know if there's a way to deserialize the collection of players into an Dictionary or better DataTable with all 31 attributes without a custom player class or accessing every attribute individually?
So far I tried accessing the players list by:
var data = JObject.Parse(json);
foreach (var field in data)
{
var data2 = JObject.Parse(field.Value.ToString());
foreach (var field2 in data2)
{
if (field2.Key.ToString() == "players")
{
dynamic array2 = JsonConvert.DeserializeObject(field2.Value.ToString());
foreach (var field3 in array2)
Console.WriteLine("Player_id: " + field3.player_id.ToString() + " - Player_name: " + field3.player_name.ToString());
}
}
}
which returns
Player_id: 10 - Player_name: Gustavo Ferrareis
Player_id: 22 - Player_name: Getúlio
Player_id: 22 - Player_name: Getúlio
I imagine something like:
Dictionary<string, object> dict = new Dictionary<string, object>();
foreach (var player in array2)
dict.Add(player.Key(), player.Value());
The answer can't be that I have to make an custom player class and then use that?
Open for any advice.
Thank you.

You can use Newtonsoft.Json.Linq and get the required result as shown below:
var jObject = JObject.Parse(jsonFromAPI)["api"];
var formattedPlayers = jObject["Players"].Children()
.Select(p => $"Player_id: {p["player_id"]} - Player_name: {p["player_name"]}");
or if you wanted dictionary, then use below:
var playersDictionary = jObject["Players"].Children().Select(p => new {player_id = p["player_id"], player_name = p["player_name"]}).ToDictionary(x => x.player_id, v => v.player_name);
If you want to display all properties of Players, then you need to run loop something like below:
var allPlayerDetails = new List<Dictionary<string, object>>();
foreach (JObject player in jObject["Players"].Children())
{
var playerDictionary = player.Properties()
.ToDictionary<JProperty, string, object>(property => property.Name, property => property.Value);
allPlayerDetails.Add(playerDictionary);
}
for (var index = 0; index < allPlayerDetails.Count; index++)
{
var playerDictionary = allPlayerDetails[index];
Console.WriteLine(Environment.NewLine);
Console.WriteLine(string.Format("Printing Player# {0}", index));
foreach (var d in playerDictionary)
{
Console.WriteLine(d.Key + " - " + d.Value);
}
}
If you want to convert to DataTable from list of players, then you can do something like below:
DataTable dt = new DataTable();
foreach (var column in allPlayerDetails.SelectMany(p => p.Keys).Select(k => k.Trim()).Distinct())
{
dt.Columns.Add(new DataColumn(column));
}
foreach (var details in allPlayerDetails)
{
var dr = dt.NewRow();
foreach (DataColumn dc in dt.Columns)
{
dr[dc.ColumnName] = details.ContainsKey(dc.ColumnName) ? details[dc.ColumnName] : null;
}
dt.Rows.Add(dr);
}
Fiddler can be found here.

You could parse into IEnumerable<string> like this:
IEnumerable<string> = JObject.Parse(json)["players"]
.Children()
.Select(jo => $"Player_id: {jo["player_id"]} - Player_name: {jo["player_name"]});
A similar approach would work for Dictionary using ToDictionary instead of Select, but it depends on what you consider key and value.

Here is the single line code to get the playerid and playername to List or Dictionary
//To List
var resultToList = JObject.Parse(jsonstring)["api"]["players"]
.Select(p => (p["player_id"].ToString(), p["player_name"].ToString()))
.ToList();
//To Dictionary
var resultToDict = JObject.Parse(jsonstring)["api"]["players"]
.Select(p => (p["player_id"].ToString(), p["player_name"].ToString()))
.ToDictionary(x=>x.Item1, y=>y.Item2);

loading data from csv file into key and value dictionary list

I have a file consisting of a list of text which looks as follows:
Example csv file
There csv file has consist of 3 columns. The first columns will always be the length of 5. So I want to loop through the file content, store those first 5 letters as Key and remaining column as value. I am removing comma between them and Substringing as follows to store.
static string line;
static Dictionary<string, string> stations = new Dictionary<string, string>();
static void Main(string[] args)
{
// Dictionary<string, List<KeyValuePair<string, string>>> stations = new Dictionary<string, List<KeyValuePair<string, string>>>();
var lines = File.ReadAllLines(".\\ariba_sr_header_2017122816250.csv");
foreach (var l in lines)
{
line = l.Replace(",", "");
stations.Add(line.Substring(14),line.Substring(14, line.Length-14));
}
//read all key and value in file
foreach (KeyValuePair<string, string> item in stations)
{
Console.WriteLine(item.Key);
Console.WriteLine(item.Value);
}
Console.ReadLine();
}
After debug, the output is
Output
My Expected Result is as follow:
Expected Result

I cannot see any KeyValuePair here. You have
00021,00014,Ordered
00021,00026,Ordered
00024,00036,Ordered
...
and you want
00021
00021
00024
000014Ordered
000026Ordered
000036Ordered
...
outcome which seems to be IEnumerable<string>. You can try Linq for this
var result = File
.ReadLines(".\\ariba_sr_header_2017122816250.csv")
.Line(line => line.Split(','))
.SelectMany(items => new string[] {
items[0],
$"0{items[1]}{items[2]}" })
.OrderBy(item => item.Length);
foreach (var item in result)
Console.WriteLine(item);
Here we Split each line like 00021,00014,Ordered into separate items: {00021, 00014, Ordered}anf then combine them back with a help ofSelectMany`. We want
00021 which is items[0]
000014Ordered which is 0 + items[1] + items[2]
Finally we want to have short items first - OrderBy(item => item.Length)

Here you go:
var stations = new Dictionary<string, string>();
var lines = File.ReadAllLines(#"C:\temp\22.txt");
foreach (var l in lines)
{
var lsplit = l.Split(',');
if (lsplit.Length > 1)
{
var newkey = lsplit[0];
var newval = lsplit[1] + lsplit[2];
stations[newkey] = newval;
}
}
//read all key and value in file
foreach (KeyValuePair<string, string> item in stations)
{
Console.WriteLine(item.Key + " = " + item.Value);
}
Console.ReadLine();
Not exactly the output you expected, but hopefully it helps.

C# KeyValue foreach column in row

I am here today trying to work out how I can do this. I have the code below to look through each column in a DataRow, but how can I access the key AND value? I want to assign it to a dictionary in the class but I can't seem to get both of them, the only way I can get anything is by calling:
var columnValue = playerDataRow[column];
Here is the full thing:
using (var mysqlConnection = Sirius.GetServer().GetDatabaseManager().GetConnection())
{
mysqlConnection.SetQuery("SELECT * FROM `users` WHERE `auth_ticket` = #authTicket LIMIT 1");
mysqlConnection.AddParameter("authTicket", authTicket);
var playerDataTable = mysqlConnection.GetTable();
foreach (DataRow playerDataRow in playerDataTable.Rows)
{
foreach (DataColumn column in playerDataTable.Columns)
{
var columnValue = playerDataRow[column];
}
}
}

foreach (DataRow playerDataRow in playerDataTable.Rows)
{
var myDic = new Dictionary<string, object>();
foreach (DataColumn column in playerDataTable.Columns)
{
myDic.Add(column.ColumnName, playerDataRow[column]);
}
}

the variable column will be the key and the value will be columnValue

looks that you only want one row of output - perhaps for this specific user based on auth_ticket
here is an example of how to get all values for this row into a Dictionary of strings (I'm converting all data to strings by the way just for this example)
var htRowValues = new Dictionary<string,string>();
using (var mysqlConnection = Sirius.GetServer().GetDatabaseManager().GetConnection())
{
mysqlConnection.SetQuery("SELECT * FROM `users` WHERE `auth_ticket` = #authTicket LIMIT 1");
mysqlConnection.AddParameter("authTicket", authTicket);
var playerDataTable = mysqlConnection.GetTable();
foreach (DataRow playerDataRow in playerDataTable.Rows)
{
foreach (DataColumn column in playerDataTable.Columns)
{
var columnValue = playerDataRow[column];
htRowValues[column.ColumnName]=System.Convert.ToString(columnValue);
}
}
}
now you have all column values in the dictionary for this one row of data.

Loop through DataTable and select only certain values in column

I have a DataTable from which I would like to loop through each row and column and then select a value from a specific column depending on the other values in the columns/each row.
My code currently looks like this:
foreach (DataRow drow in dt.Rows)
{
foreach (DataColumn dcol in dt.Columns)
{
foreach (var Item in ImportData)
{
if (Item.Value.Equals(true))
{
if (Item.Key.Equals("" + dcol))
{
string value = drow[dcol].ToString();
if (value.Equals("X"))
{
outDraws += drow["Drawing"].ToString();
outDraws += "\n";
}
}
}
}
}
}
ImportData is a Dictionary<string, bool>, which holds the data that I want to compare with my DataTable.
string outDraws is just a string which should hold the content of the drawings I want to print out.
My problem now is that I only want to print out the content in the column 'Drawing' of the row where all columns with the same name as the Keys in ImportData have 'X' as value. At the moment I'm getting all the rows where any of the columns have 'X' as value and has the same name as any Key in ImportData.
I understand that it will be quite hard for you to get what I want to do but please ask if you need any more information and I will try to provide.
Many thanks in advance.
Edit:
ImportData contains the name of different products as keys. These products have either been selected or not by the customer through another program, if they have been selected they have the value true and if not selected they have the value false.
With the method presented above I would like to compare ALL the keys that have the value true with the column names in the DataTable. If the column name corresponds to the key in ImportData (which is the name of a product) then I want to check if that column in a specific row has 'X' as value.
This goes on for ALL the keys in ImportData and in the end I should know which row in the DataTable that has an 'X' in all the columns with the same name as the keys in ImportData. For this row I would like to get the content of the column called 'Drawing'.
So for an example say that ImportData contains:
[Motor, true][Product6, true][Product7, true]
Then I would like to print out the column Drawing at row 6.
Unfortunately I can't post pictures..

As with any problem: divide and conquer. Break down your problem in smaller pieces and go from there.
From what I understand, you want to do something with certain rows from the datatable. Something like:
foreach (var drow in dt.Rows.OfType<DataRow>())
{
if (SomeConditionIsMet(dt, drow, ImportData))
{
outDraws += drow["Drawing"].ToString();
outDraws += "\n";
}
}
The function SomeConditionIsMetcould looks like this:
private static bool SomeConditionIsMet(
DataTable dt, DataRow drow,
IDictionary<string, bool> importData)
{
// TODO if the condition is met, return true
// otherwise, return false
}
Now your problem is simplified to thinking about what it means that 'Some condition is met'. Once you can clearly express that in words, rename the function to reflect that (e.g. to 'AllColumnsAreChecked')
Here's a sample with solution as I understand it:
internal class Program
{
private static void Main(string[] args)
{
var importData = new Dictionary<string, bool>()
{
{"Product1", true},
{"Product2", false},
{"Product3", true},
};
var dt = new DataTable();
dt.Columns.Add("Product1");
dt.Columns.Add("Product2");
dt.Columns.Add("Product3");
dt.Columns.Add("Product4");
dt.Columns.Add("Drawing");
// row1 should be added
var row1 = dt.NewRow();
row1["Product1"] = "X";
row1["Product3"] = "X";
row1["Drawing"] = "Drawing1";
dt.Rows.Add(row1);
// row2 should not be added
var row2 = dt.NewRow();
row2["Product1"] = "X";
row2["Drawing"] = "Drawing2";
dt.Rows.Add(row2);
string outDraws = string.Empty;
foreach (DataRow drow in dt.Rows.OfType<DataRow>())
{
if (AllColumnsAreChecked(drow, importData))
{
outDraws += drow["Drawing"].ToString();
outDraws += "\n";
}
}
Console.WriteLine(outDraws);
}
private static bool AllColumnsAreChecked(DataRow drow, Dictionary<string, bool> importData)
{
foreach (var key in importData.Keys)
{
if (!importData[key])
continue;
var value = drow[key] as string;
if (value != "X")
return false;
}
}
}
Bonus: here's a LINQ based implementation of the check:
private static bool AllColumnsAreChecked(DataRow drow, Dictionary<string, bool> importData)
{
return importData.Keys
.Where(k => importData.ContainsKey(k) && importData[k]) // the field must be enabled in importData
.All(k => (drow[k] as string) == "X"); // the corresponding value in the row must be 'X'
}

Try this
DataTable tbl = new DataTable();
foreach (DataRow row in tbl.Rows)
{
object cellData = row["colName"];
}

C# looping through List<dictionary<string,string>> to populate a DataTable

I need to loop through a List of Dictionaries
List<Dictionary<string,string>>
to populate a DataTable. Each Dictionary in the list has a Key, which needs to be the column name, and a Value which is what's in that column. The list contains 225 dictionaries (225 rows to the table).
List<Dictionary<string, string>> myList =
JsonConvert.DeserializeObject<List<Dictionary<string, string>>>(jsonRep);
DataTable dt = new DataTable();
//loop through list, loop through dictionaries, add keys as columns,
//values as rows.
so far, I have been trying..
//get max columns
int columns = myList[0].Count; <--gives me 13
//add columns
for (int i = 0; i < columns; i++)
dt.Columns.Add(string myList[i].Keys); <--somehow get to the key in dict to add as column names
//add rows
foreach (var x in myList)
{
dt.Rows.Add(x); <--not working
}
jsonReprValue = dt; <--save new DataTable to var jsonReprValue
How do I do this correctly?
Thanks!

You have two problems. One is adding the columns, and the other is adding the rows.
Adding the columns
Assuming your list has items in it, and that all the dictionaries in the list have the same keys, then you only need to add columns from one of the dictionaries:
foreach(string column in myList[0].Keys)
{
dt.Columns.Add(column);
}
Adding the Rows
Change this:
foreach (var x in myList)
{
dt.Rows.Add(x); <--not working
}
To this:
foreach(Dictionary<string, string> dictionary in myList)
{
DataRow dataRow = dt.NewRow();
foreach(string column in dictionary.Keys)
{
dataRow[column] = dictionary[column];
}
dt.Rows.Add(dataRow);
}
See DataTable.NewRow.

Reiview DataTable Class's example on how to work with a data table. But here is an example using Linq
List<Dictionary<string, string>> myList = new List<Dictionary<string, string>>()
{ new Dictionary<string,string>() { { "ABC", "This" },
{ "DEF", "is" },
{ "GHI", "radio" },
{ "JKL", "clash" } } };
DataTable dt = new DataTable();
// Add columns first
dt.Columns.AddRange( myList.First ()
.Select (kvp => new DataColumn() { ColumnName = kvp.Key, DataType = System.Type.GetType("System.String")} )
.AsEnumerable()
.ToArray()
);
// Now add the rows
myList.SelectMany (Dict => Dict.Select (kvp => new {
Row = dt.NewRow(),
Kvp = kvp
}))
.ToList()
.ForEach( rowItem => {
rowItem.Row[rowItem.Kvp.Key] = rowItem.Kvp.Value;
dt.Rows.Add( rowItem.Row );
}
);
dt.Dump();
The result (Dump is LinqPad specific not .Net):