LINQ2SQL à DataTable

Question

Quelle est la meilleure façon de copier une table LINQ2SQL dans un ADO.NET DataTable?

Answer 1

Voici un billet de blog sur une méthode d'extension qui je pense serait faire ce que vous voulez:

Code

http://iandykes.blogspot.com/2008/05/ienumerable-to-dataset-extension-method.html

par Keith Elder

/// <summary> 

/// This will take anything that implements the ICollection interface and convert 

/// it to a DataSet. 

/// </summary> 

/// <example> 

/// CollectiontoDataSet converter = new CollectionToDataSet<Letters[]>(letters); 

/// DataSet ds = converter.CreateDataSet(); 

/// </example> 

/// <typeparam name="T"></typeparam> 

public class CollectionToDataSet<T> where T : System.Collections.ICollection 

{ 

    T _collection; 

    public CollectionToDataSet(T list) 

    { 

     _collection = list; 

    } 



    private PropertyInfo[] _propertyCollection = null; 

    private PropertyInfo[] PropertyCollection 

    { 

     get 

     { 

      if (_propertyCollection == null) 

      { 

       _propertyCollection = GetPropertyCollection(); 

      } 

      return _propertyCollection; 

     } 

    } 



    private PropertyInfo[] GetPropertyCollection() 

    { 

     if (_collection.Count > 0) 

     { 

      IEnumerator enumerator = _collection.GetEnumerator(); 

      enumerator.MoveNext(); 

      return enumerator.Current.GetType().GetProperties(); 

     } 

     return null; 

    } 



    public DataSet CreateDataSet() 

    { 

     DataSet ds = new DataSet("GridDataSet"); 

     ds.Tables.Add(FillDataTable()); 

     return ds; 

    } 



    private DataTable FillDataTable() 

    { 

     IEnumerator enumerator = _collection.GetEnumerator(); 

     DataTable dt = CreateDataTable(); 

     while (enumerator.MoveNext()) 

     { 

      dt.Rows.Add(FillDataRow(dt.NewRow(),enumerator.Current)); 

     } 

     return dt; 

    } 



    private DataRow FillDataRow(DataRow dataRow, object p) 

    { 

     foreach (PropertyInfo property in PropertyCollection) 

     { 

      dataRow[property.Name.ToString()] = property.GetValue(p, null); 

     } 

     return dataRow; 

    } 



    private DataTable CreateDataTable() 

    { 

     DataTable dt = new DataTable("GridDataTable"); 

     foreach (PropertyInfo property in PropertyCollection) 

     { 

      dt.Columns.Add(property.Name.ToString()); 

     } 

     return dt; 

    } 

}