Hi luckydead,

Use ClosedXML library. For more details on ClosedXML refer below article.

Read and import Excel file data to DataGridView using ClosedXml using C# and VB.Net

Refer below sample and change as per your requirement.

Namespaces

C#

using System.Data;
using System.IO;
using ClosedXML.Excel;

VB.Net

Imports System.Data
Imports System.IO
Imports ClosedXML.Excel

Code

C#

private void btnCheckFile_Click(object sender, EventArgs e)
{
    string filesPath = @"E:\Files";
    string[] files = new[] { filesPath + @"\Sample.xlsx", filesPath + @"\Sample1.xlsx" };
    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[] { new DataColumn("FileName"), new DataColumn("Status") });
    string sheetName = "Customers";
    foreach (string file in files)
    {
        using (XLWorkbook wb = new XLWorkbook(file))
        {
            IXLWorksheets workSheets = wb.Worksheets;
            if (workSheets.Count > 1)
            {
                dt.Rows.Add(Path.GetFileName(file), "Error");
            }
            else
            {
                IXLWorksheet workSheet = wb.Worksheet(1);
                dt.Rows.Add(Path.GetFileName(file), workSheet.Name == sheetName ? "Ok" : "Error");
            }
        }
    }

    dataGridView1.DataSource = dt;
}

VB.Net

Private Sub btnCheckFile_Click(sender As Object, e As EventArgs) Handles btnCheckFile.Click
    Dim filesPath As String = "E:\Files"
    Dim files As String() = {filesPath & "\Sample.xlsx", filesPath & "\Sample1.xlsx"}
    Dim dt As DataTable = New DataTable()
    dt.Columns.AddRange(New DataColumn() {New DataColumn("FileName"), New DataColumn("Status")})
    Dim sheetName As String = "Customers"
    For Each file As String In files
        Using wb As XLWorkbook = New XLWorkbook(file)
            Dim workSheets As IXLWorksheets = wb.Worksheets
            If workSheets.Count > 1 Then
                dt.Rows.Add(Path.GetFileName(file), "Error")
            Else
                Dim workSheet As IXLWorksheet = wb.Worksheet(1)
                dt.Rows.Add(Path.GetFileName(file), If(workSheet.Name = sheetName, "Ok", "Error"))
            End If
        End Using
    Next

    dataGridView1.DataSource = dt
End Sub

Screenshot