Delete Duplicate rows from DataTable based on column name using C# and VB.Net in ASP.Net

Hi Vasanth057,

I have created sample that full-fill your requirement.

HTML

<asp:GridView runat="server" ID="gvOriginal" Caption="Original" />
<br />
<asp:GridView runat="server" ID="gvDistinct" Caption="Distinct" />

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[2] { new DataColumn("Name", typeof(string)), new DataColumn("Value", typeof(string)) });
        dt.Rows.Add("Name1", "123");
        dt.Rows.Add("Name1", "123");
        dt.Rows.Add("Name2", "321");
        gvOriginal.DataSource = dt;
        gvOriginal.DataBind();
        DataTable distinctTable = dt.AsEnumerable()
                                    .GroupBy(x => x.Field<string>("Name"))
                                    .Select(x => x.First())
                                    .CopyToDataTable();
        gvDistinct.DataSource = distinctTable;
        gvDistinct.DataBind();
    }
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
    If Not IsPostBack Then
        Dim dt As New DataTable()
        dt.Columns.AddRange(New DataColumn(1) {New DataColumn("Name", GetType(String)), New DataColumn("Value", GetType(String))})
        dt.Rows.Add("Name1", "123")
        dt.Rows.Add("Name1", "123")
        dt.Rows.Add("Name2", "321")
        gvOriginal.DataSource = dt
        gvOriginal.DataBind()
        Dim distinctTable As DataTable = dt.AsEnumerable() _
                                           .GroupBy(Function(x) x.Field(Of String)("Name")) _
                                           .[Select](Function(x) x.First()) _
                                           .CopyToDataTable()
        gvDistinct.DataSource = distinctTable
        gvDistinct.DataBind()
    End If
End Sub

Output