Comment faire une boucle sur les valeurs d'une colonne particulière dans datatable?

Question

Je veux parcourir les valeurs d'une colonne particulière dans datatable? quelqu'un peut-il s'il vous plaît donner le codage C#?

Answer 1

Salut essayer ci-dessous l'extrait de code

 
    using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Data;
 

namespace ConsoleApplication1 
{ 
    class Program 
    { 
     public static DataTable GetDataTable() 
     { 
      //Create a new DataTable object 
      DataTable objDataTable = new DataTable(); 
      //Create three columns with string as their type 
      objDataTable.Columns.Add("Column 1", typeof(string)); 
      objDataTable.Columns.Add("Column 2", typeof(string)); 
      objDataTable.Columns.Add("Column 3", typeof(string)); 
      //Adding some data in the rows of this DataTable 
      objDataTable.Rows.Add(new string[] { "Row1 - Column1", "Row1 - Column2", "Row1 - Column3" }); 
      objDataTable.Rows.Add(new string[] { "Row2 - Column1", "Row2 - Column2", "Row2 - Column3" }); 
      objDataTable.Rows.Add(new string[] { "Row3 - Column1", "Row3 - Column2", "Row3 - Column3" }); 
      return objDataTable;
 

} 
    static void Main(string[] args) 
    { 

     foreach (DataRow row in GetDataTable().Rows) 
     { 

      object cellData = row["Column 1"]; 
      Console.WriteLine(cellData); 

     } 


    } 
} 

}

Answer 2

essayer solution ci-dessous Linq

var values = (from t in dt.AsEnumarable() // dt is your data table 
      select t[ColumnName]).ToList().ForEach(your expression); 


or try normal way 

foreach(DataRow drow in dt.Rows) 
{ 
     string value = drow[columnname].ToString(); 
} 

Answer 3

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