Set DropDownList selected Text in ASP.Net GridView using C# and VB.Net

Hi Mehram,

Refer below code

HTML

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" OnRowDataBound="OnRowDataBound">
    <Columns>
        <asp:BoundField DataField="CustomerId" HeaderText="CustomerId" />
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:TemplateField HeaderText="Country" SortExpression="SampleDetail">
            <ItemTemplate>
                <asp:Label ID="lblCountry" runat="server" Text='<%# Eval("Country") %>' Visible="false"></asp:Label>
                <asp:DropDownList ID="countries" runat="server" CssClass="chzn-select">
                    <asp:ListItem Text="United States" Value="0"></asp:ListItem>
                    <asp:ListItem Text="India" Value="1"></asp:ListItem>
                    <asp:ListItem Text="France" Value="2"></asp:ListItem>
                    <asp:ListItem Text="Russia" Value="3"></asp:ListItem>
                </asp:DropDownList>
            </ItemTemplate>
            <ItemStyle HorizontalAlign="left" Width="5px" Wrap="true" />
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Namespaces

C#

using System.Data;
using System.Data.SqlClient;

VB.Net

Imports System.Data
Imports System.Data.SqlClient

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        GridView1.DataSource = GetData("SELECT CustomerId, Name, Country FROM Customers");
        GridView1.DataBind();
    }
}

private DataSet GetData(string query)
{
    string constring = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    SqlCommand cmd = new SqlCommand(query);
    using (SqlConnection con = new SqlConnection(constring))
    {
        using (SqlDataAdapter sda = new SqlDataAdapter())
        {
            cmd.Connection = con;
            sda.SelectCommand = cmd;
            using (DataSet ds = new DataSet())
            {
                sda.Fill(ds);
                return ds;
            }
        }
    }
}

Code

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        GridView1.DataSource = GetData("SELECT CustomerId, Name, Country FROM Customers")
        GridView1.DataBind()
    End If
End Sub

Private Function GetData(ByVal query As String) As DataSet
    Dim constring As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Dim cmd As SqlCommand = New SqlCommand(query)

    Using con As SqlConnection = New SqlConnection(constring)

        Using sda As SqlDataAdapter = New SqlDataAdapter()
            cmd.Connection = con
            sda.SelectCommand = cmd

            Using ds As DataSet = New DataSet()
                sda.Fill(ds)
                Return ds
            End Using
        End Using
    End Using
End Function

Protected Sub OnRowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.DataRow Then
        Dim countries As DropDownList = (TryCast(e.Row.FindControl("countries"), DropDownList))
        Dim country As String = (TryCast(e.Row.FindControl("lblCountry"), Label)).Text
        countries.Items.FindByText(country).Selected = True
    End If
End Sub

Screenshot