Datatable to string list c#

WebJul 4, 2012 · DataTable dt = new DataTable (); dt.Columns.Add (); dt.Columns.Add (); dt.Columns.Add (); List tempList = new List () { "a", "b", "c" }; dt.Rows.Add (tempList.ToArray ()); Share Improve this answer Follow answered Jul 4, 2012 at 12:29 VEDAVYAS BHAT 21 1 Add a comment Your Answer Post Your Answer WebJul 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

How to Convert the value in DataTable into a string array in c#

WebJun 30, 2016 · An alternative method in getting a list of DataRow is to Select () the DataTable. It returns a DataRow [] that can easily be converted into a list. DataTable dt = new DataTable (); // TODO: Insert data into DataTable foreach (DataRow row in dt.Select ()) { Console.WriteLine (); Console.WriteLine (row [0].ToString ()); Console.WriteLine … 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) cths manitoba https://novecla.com

c# - datatable to string - Stack Overflow

Webprivate IEnumerable ConvertToTankReadings (DataTable dataTable) { var tankReadings = new List (); foreach (DataRow row in dataTable.Rows) { var tankReading = new TankReading { TankReadingsID = Convert.ToInt32 (row ["TRReadingsID"]), TankID = Convert.ToInt32 (row ["TankID"]), ReadingDateTime = Convert.ToDateTime (row … WebMar 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 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 earthlands best baby food

How to get list of one column values from DataTable in C#?

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Datatable to string list c#

How to Convert DataTable to Generic List in C# [duplicate]

WebOct 1, 2016 · List BrandsInDataTable = new List (); DataTable g = Access._ME_G_BrandsInPop (); if (g.Rows.Count &gt; 0) { for (int x = 0; x &lt; 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 … 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 ...

Datatable to string list c#

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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对象或传入的是单类型的List时转换会出错，现对代码进行了些修改，反正代码测试基本是跑通了，对List，单个Object对象，以及List 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

WebMar 1, 2024 · Convert DataTable to List using a Generic Method This is a generic method that will convert any type of DataTable to a List (the DataTable structure and List class structure should be the same). The following are the two functions in which if we pass a DataTable and a user defined class. 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 …

WebNov 5, 2010 · I think all the solutions can be improved and make the method more general if you use some conventions and reflection. Let's say you name your columns in the datatable the same name as the properties in your object, then you could write something that look at all your properties of your object and then look up that column in the datatable to map … WebSep 17, 2024 · 2. Convert to DataRow [] first by Select, then SelectMany to flatten to an array of object. Finally, convert each value object to string. var list = dt.Select ().SelectMany (row =&gt; row.ItemArray).Select (x=&gt; (string)x).ToList () Share. Improve this answer. Follow.

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, …

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 [ … cths mapWebJun 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() + … earth landscape ctWeb2 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 … cths mixed sale resultscths medical abbreviationWebMar 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 … earth landscape imagesWebI 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... cths national officeWebOct 17, 2024 · If you just need a comma separated list for all of row values you can do this: StringBuilder sb = new StringBuilder(); foreach (DataRow row in results.Tables[0].Rows) { sb.AppendLine(string.Join(",", row.ItemArray)); } A StringBuilder is the preferred method as string concatenation is significantly slower for large amounts of data. earthlands gamer