Datatable to string list c#

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Web2 days ago · GroupBy(data => data[0], StringComparer.OrdinalIgnoreCase). ToDictionary(data => data.Key, data => data.First()[2], StringComparer.OrdinalIgnoreCase); I know the problem lies in the parameters in the ToDictionary() function. My code only gets the first match. But I cannot figure out how to … Web列表視圖就像我需要將Listview的數據添加到Dictionary lt String,String gt 。現在我正在使用for loop來做到這一點。有沒有辦法使用LINQ來做到這一點。最后，詞典將包含編輯我的代碼：提前致謝 ... [英]C# : How to add data data from a ListView control to a Dictionary

C# - Ways to Convert Datatable to List in C# (with …

WebSep 15, 2009 · public List ConvertToList (DataTable dt) { var columnNames = dt.Columns.Cast () .Select (c => c.ColumnName) .ToList (); var properties = typeof (T).GetProperties (); return dt.AsEnumerable ().Select (row => { var objT = Activator.CreateInstance (); foreach (var pro in properties) { if (columnNames.Contains … WebHi. I am trying to create a data table from a string variable. The string contains information as below. ... -like this and continuing till end How to achieve this in C#? C#. C# An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming. how do you clean outdoor rugs

how convert DataTable to List in C# - Stack …

WebSep 29, 2013 · private static DataTable ConvertToDatatable (List data) { PropertyDescriptorCollection props = TypeDescriptor.GetProperties (typeof (T)); DataTable table = new DataTable (); for (int i = 0; i )) table.Columns.Add (prop.Name, prop.PropertyType.GetGenericArguments () [0]); else table.Columns.Add (prop.Name, … WebMar 13, 2024 · StringBuilder 是一个可变的字符串类型，它在 C# 中是 System.Text 命名空间中的一个类。这意味着在使用 StringBuilder 类之前，你需要在你的代码中包含下面的语句： using System.Text; 你可以通过两种方式来创建 StringBuilder 对象： - 使用带有初始字符串的构造函数： StringBuilder sb = new StringBuilder("Initial string ... WebIn this example, we create a DataTable with two columns, "Id" and "Name", and add three rows to it. We then use the AsEnumerable extension method to convert the DataTable to an IEnumerable, and use the Select method to extract the "Name" column from each row using the Field method. We then convert the result to a List called … pho with egg noodles

C# - Ways to Convert Datatable to List in C# (with …

Create DataTable from string - Microsoft Q&A

WebOct 1, 2016 · List BrandsInDataTable = new List (); DataTable g = Access._ME_G_BrandsInPop (); if (g.Rows.Count > 0) { for (int x = 0; x < g.Rows.Count; x++) BrandsInDataTable.Add (g.Rows [x] ["Name"].ToString ()); } else return; Share Improve this answer Follow answered Oct 20, 2024 at 17:51 Leo Garza 41 5 Add a … WebJun 2, 2010 · What you can do is concatenate all the column in a single string and then add them in a list of string. To do that modify your query like 'CK' said. var data = (from a in db.CoA where a.ParentId == 0 && a.Asset == true select new { a.Asset.ToString() + … pho with flankWebJul 11, 2015 · List results = dt.Select () .Select (dr => dr.ItemArray .Select (x => x.ToString ()) .ToArray ()) .ToList (); This only works if the items stored in dr.ItemArray have overriden .ToString () in a meaningful way. Luckily the primitive types do. Share Improve this answer Follow answered Jul 11, 2015 at 8:21 Enigmativity 112k 11 90 172 pho with chicken

"WebMar 1, 2024 · Convert DataTable to List Using Linq This is the modern approach for creating a List in C#. public void StudentListUsingLink () { // DataTable dt = new … " - Datatable to string list c#

Datatable to string list c#

c# - Sorting List data with a certain criteria using Sort(), - Stack ...

WebDec 15, 2024 · private static void ConvertUsingForEach(DataTable table) { var categoryList = new List (table.Rows.Count); foreach (DataRow row in table.Rows) { var values = row.ItemArray; var category = new Category … Web之前写了个 List item.toDataTable() 这种链式调用的List转换为DataTable的方法，有两位热心的网友提出了存在的一些缺陷，如果传入的obj参数不是List而是单个object对 …

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WebAug 11, 2016 · Closed 6 years ago. I need to convert C# DataTable to Generic Collection List. DataTable Columns Respectively 1. EmpId (this is Int DataType) 2. EmpName (this is varchar DataType) 3. EmpAddress (this is varchar DataType) 4. EmpPhone (this is varchar DataType) 5. Status (this is Boolean DataType) 6. EmpRelationKey (this is int DataType) WebJan 24, 2024 · You need to change the code from List column1List = (returnDataTable.AsEnumerable ().Select (x => x ["Column1"].ToString ()).ToList ()).Distinct (); List column1List = (returnDataTable.AsEnumerable ().Select (x => x ["Column1"].ToString ()).Distinct ().ToList (); Share Improve this answer Follow edited …

Web2 Answers Sorted by: 4 You'll need to add a column to the data table first. As it is created is has no columns DataTable datatable= new DataTable (); DataColumn workCol = datatable.Columns.Add ("column_name", typeof (String)); Share Improve this answer Follow answered Nov 22, 2024 at 17:04 Carlo Bos 3,020 2 15 27 Add a comment 0 WebApr 11, 2024 · Actually, I sort them in this simple way. somedata.Sort (); and then I copied them in a new list iterating the list of the Group= (Feline, Equidae, Fish, Feline, Bird 1, Bird 2....) parameter because I would divide the list per group type. This iteration copy also the "other data" and in second list that then I merge between putting them using ...

WebAug 10, 2024 · This is a simple use case. If you want to get an string array of the full name. Below code will help you to get it. The below code concatenates the First Name and Last Name. And return a string array of full name. IList< string > studentNames = dtStudents.AsEnumerable ().Select (item => string .Format ( " {0}, {1}", item [ …

WebFeb 17, 2024 · string [] columnNames = dataTable.Columns.AsEnumerable ().Select (column => column.Name).ToArray (); You may also implement one more extension method for DataTable class to reduce code: public static class DataTableExtensions { public static IEnumerable GetColumns (this DataTable source) { return …

WebDec 15, 2024 · Rows select new Category() { Id = Convert.ToInt32 (dr [ "Id" ]), CategoryName = dr [ "CategoryName" ].ToString (), IsActive = Convert.ToBoolean (dr [ "IsActive" ]), }).ToList (); } pho with egg noodleWebOct 16, 2008 · DataTable.Select() doesnt give the Rows in the order they were present in the datatable. If order is important I feel iterating over the datarow collection and forming a List is the right way to go or you could also use overload of DataTable.Select(string filterexpression, string sort).. But this overload may not handle all the ordering (like order … how do you clean paversWebMar 27, 2016 · C# List< Student > studentDetails = new List< Student > (); studentDetails = ConvertDataTable< Student > (dt); Change the Student class name and dt value based on your requirements. In this case, the DataTable column's name and class property name should be the same, otherwise this function will not work properly. Summary how do you clean perky pet hummingbird feederWebAug 26, 2009 · I have a datatable that is comprised on one column. I want to add the data from the data table to a List. what is the syntax for doing this. · Hi, I hope it will … pho with flank steakWebIn this example, we create a DataTable with two columns, "Id" and "Name", and add three rows to it. We then use the AsEnumerable extension method to convert the DataTable to … pho with beef tendonWebI want to know how to transform a DataTable into a Dictionary. I did something like this. using System.Linq; internal Dictionary GetDict(DataTable dt) { return dt.AsEnume... how do you clean piano keysWebSep 17, 2014 · In your current code you are trying to fill List using DataAdapter. You can't do that. Instead you can fill a DataTable and then get a List like: DataTable dt = new DataTable (); cmd.CommandType = CommandType.StoredProcedure; SqlDataAdapter da = new SqlDataAdapter (cmd); da.Fill (dt); Users = dt.AsEnumerable … pho with us