troubleshooting Question

VB.NET - Error on Export to Excel

Avatar of Wilder1626
Wilder1626Flag for Canada asked on
Visual Basic.NET
1 Comment1 Solution9 ViewsLast Modified:
Hi again.

I'm trying to export to Excel all columns from my DataGridView1.
Ex:

I'm using below code:
Imports System.Data
Imports System.Reflection
Imports ClosedXML.Excel

Open in new window


Private Sub Button4_Click_1(sender As Object, e As EventArgs) Handles btnExportToExcel.Click
        'Creating DataTable
        Dim dt As New DataTable()

        'Adding the Columns
        For Each column As DataGridViewColumn In DataGridView1.Columns
            dt.Columns.Add(column.HeaderText, column.ValueType)
        Next

        'Adding the Rows
        For Each row As DataGridViewRow In DataGridView1.Rows
            dt.Rows.Add()
            For Each cell As DataGridViewCell In row.Cells
                dt.Rows(dt.Rows.Count - 1)(cell.ColumnIndex) = cell.Value.ToString()
            Next
        Next

        'Exporting to Excel
        Dim folderPath As String = "C:\"
        If Not Directory.Exists(folderPath) Then
            Directory.CreateDirectory(folderPath)
        End If
        Using wb As New XLWorkbook()
            wb.Worksheets.Add(dt, "Customers")
            wb.SaveAs(folderPath & Convert.ToString("DataGridViewExport.xlsx"))
        End Using
    End Sub

Open in new window

The problem i have is that i'm getting below error, and i don't understand why:


What can i do to fix this problem?

Thank you.
ASKER CERTIFIED SOLUTION
Log in to continue reading
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform for $9.99/mo
View membership options
Unlock 1 Answer and 1 Comment.
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
The Value of Experts Exchange in My Daily IT Life

Experts Exchange (EE) has become my company's go-to resource to get answers. I've used EE to make decisions, solve problems and even save customers. OutagesIO has been a challenging project and... Keep reading >>

Mike

Owner of Outages.IO
Phoenix, Arizona, United States
Member Since 2016
Join a full scale community that combines the best parts of other tools into one platform.
Unlock 1 Answer and 1 Comment.
View membership options
“All of life is about relationships, and EE has made a virtual community a real community. It lifts everyone's boat.”
William Peck

Member since 2004