Check if ASP.Net DetailsView cell data is null or not using C# and VB.Net

Hi tareq16278,

Check this example. Now please take its reference and correct your code.

Database

I have made use of the following table Customers with the schema as follows.

I have already inserted few records in the table.

You can download the database table SQL by clicking the download link below.

Download SQL file

HTML

<asp:DetailsView ID="dvCustomers" runat="server" AutoGenerateRows="false"
    AllowPaging="true" OnPageIndexChanging="OnPageIndexChanging">
    <Fields>
        <asp:BoundField HeaderText="CustomerId" DataField="CustomerId" />
        <asp:BoundField HeaderText="Name" DataField="Name" />
        <asp:BoundField HeaderText="Country" DataField="Country" />
    </Fields>
</asp:DetailsView>
<hr />
<asp:Label ID="lblName" runat="server" />

Namespaces

C#

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

VB.Net

Imports System.Data
Imports System.Data.SqlClient
Imports System.Configuration

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        this.BindGrid();
    }
}

protected void OnPageIndexChanging(object sender, DetailsViewPageEventArgs e)
{
    dvCustomers.PageIndex = e.NewPageIndex;
    this.BindGrid();
}
private void BindGrid()
{
    string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (SqlConnection con = new SqlConnection(conString))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT * FROM Customers", con))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
            {
                using (DataTable dt = new DataTable())
                {
                    sda.Fill(dt);
                    dvCustomers.DataSource = dt;
                    dvCustomers.DataBind();
                    string name = dvCustomers.Rows[1].Cells[1].Text.Replace(" ", "");
                    if (string.IsNullOrEmpty(name))
                    {
                        lblName.Text = "00930";
                    }
                    else
                    {
                        lblName.Text = "01";
                    }
                }
            }
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Me.BindGrid()
    End If
End Sub

Protected Sub OnPageIndexChanging(ByVal sender As Object, ByVal e As DetailsViewPageEventArgs)
    dvCustomers.PageIndex = e.NewPageIndex
    Me.BindGrid()
End Sub

Private Sub BindGrid()
    Dim conString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As SqlConnection = New SqlConnection(conString)
        Using cmd As SqlCommand = New SqlCommand("SELECT * FROM Customers", con)
            Using sda As SqlDataAdapter = New SqlDataAdapter(cmd)
                Using dt As DataTable = New DataTable()
                    sda.Fill(dt)
                    dvCustomers.DataSource = dt
                    dvCustomers.DataBind()
                    Dim name As String = dvCustomers.Rows(1).Cells(1).Text.Replace(" ", "")
                    If String.IsNullOrEmpty(name) Then
                        lblName.Text = "00930"
                    Else
                        lblName.Text = "01"
                    End If
                End Using
            End Using
        End Using
    End Using
End Sub

Screenshot