How easy convert type System.Data.Linq.Table<> to System.Data.DataTable

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Hello all

I am newbie here.

I have a View in SQL. I use LINQ for my project winform - C#.

C#

DataContext db = new DataContext();

I can return that view for my GridControl.

C#

public static GridControl getUserTable(GridControl DSNV)
{
            try
            {
                var f = db.viewUserTables;
                DSNV.DataSource = f;
            }
            catch (Exception ex)
            {
                XtraMessageBox.Show(ex.Message);
            }
            return DSNV;
}

This code only return type GridControl, but i need use it for something else(Lookup...) Now, i want it can return type

C#

DataTable

.

How i can do it?

Sorry, my english very bad.

Posted 8-Jun-14 18:02pm

GinCanhViet

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*Suvabrata Roy* · Accepted Answer · 2014-06-08T18:47:00

Solution 1

Hi,

Just add this extension method.

public static DataTable ToDataTable<T>(this IList<T> data)
{
    PropertyDescriptorCollection props =
        TypeDescriptor.GetProperties(typeof(T));
    DataTable table = new DataTable();
    for(int i = 0 ; i < props.Count ; i++)
    {
        PropertyDescriptor prop = props[i];
        table.Columns.Add(prop.Name, prop.PropertyType);
    }
    object[] values = new object[props.Count];
    foreach (T item in data)
    {
        for (int i = 0; i < values.Length; i++)
        {
            values[i] = props[i].GetValue(item);
        }
        table.Rows.Add(values);
    }
    return table;        
}

How to Use

var f = db.viewUserTables.ToDataTable();

Posted 8-Jun-14 18:47pm

Suvabrata Roy

Updated 8-Jun-14 18:48pm

v2

Comments

GinCanhViet 9-Jun-14 0:59am

thank you so much, i will try it.

GinCanhViet 9-Jun-14 1:00am

Can not call var f = db.viewUserTables''.ToDataTable()''

Suvabrata Roy 9-Jun-14 3:44am

Can not call var f = db.viewUserTables.ToDataTable();

There is no double cote
That was a extension method use it like a method.
You know what is a extension method?

GinCanhViet 9-Jun-14 20:25pm

Hehe, your solution very trouble.
I've solved this myself!

Thank you!

Suvabrata Roy 10-Jun-14 0:24am

Ok that's fine but why my solution gives you trouble, you need any kind of clarification of my code ?