1、带有DataGridView的窗体，界面如下
2、编写DataGridView支持拖放的代码
Private Sub DataGridView1_DragEnter(ByVal sender As Object, ByVal e As DragEventArgs) Handles DataGridView1.DragEnter
If e.Data.GetDataPresent(DataFormats.FileDrop) Then
Dim files As String() = CType(e.Data.GetData(DataFormats.FileDrop), String())
If files IsNot Nothing AndAlso files.Any(Function(f) _
String.Equals(Path.GetExtension(f), ".xlsx", StringComparison.OrdinalIgnoreCase)) Then
e.Effect = DragDropEffects.Copy
End If
End If
End Sub
Private Sub DataGridView1_DragDrop(ByVal sender As Object, ByVal e As DragEventArgs) Handles DataGridView1.DragDrop
Try
Dim files As String() = CType(e.Data.GetData(DataFormats.FileDrop), String())
If files IsNot Nothing AndAlso files.Length > 0 Then
Dim excelPath = files(0)
If String.Equals(Path.GetExtension(excelPath), ".xlsx", StringComparison.OrdinalIgnoreCase) Then
ReadExcelToDataGridView(excelPath)
Else
MessageBox.Show("仅支持.xlsx格式的Excel文件")
End If
End If
Catch ex As Exception
MessageBox.Show("处理失败：{0}" & ex.Message)
End Try
End Sub3、使用OLEDB读取Excel文件
' 使用OLEDB读取Excel文件
Private Sub ReadExcelToDataGridView(ByVal excelPath As String)
DataGridView1.Rows.Clear()
Dim connectionString As String = String.Format(
"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0 Xml;HDR=YES""",
excelPath)
Using connection As New OleDbConnection(connectionString)
Try
connection.Open()
Dim sheetName = GetExcelSheetName(connection)
If String.IsNullOrEmpty(sheetName) Then
MessageBox.Show("无法获取Excel工作表名称")
Return
End If
'这里指定要读取excel的工作表标签名为sheetName
Dim query = String.Format("SELECT * FROM [{0}]", sheetName)
Dim adapter As New OleDbDataAdapter(query, connection)
Dim dataTable As New DataTable()
adapter.Fill(dataTable)
' 填充DataGridView（跳过标题行）
For i As Integer = 0 To dataTable.Rows.Count - 1
Dim row = dataTable.Rows(i)
Dim id = If(IsDBNull(row(0)), "", row(0).ToString())
Dim name = If(IsDBNull(row(1)), "", row(1).ToString())
Dim imgPath = If(IsDBNull(row(2)), "", row(2).ToString())
Dim img As Image = Nothing
If Not String.IsNullOrEmpty(imgPath) AndAlso File.Exists(imgPath) Then
img = Image.FromFile(imgPath)
Else
img = My.Resources.NoImage ' 需要在项目中添加默认图片资源
End If
DataGridView1.Rows.Add(id, name, img)
Next
Catch ex As Exception
MessageBox.Show("读取Excel失败：{ex.Message}")
End Try
End Using
End Sub
' 获取Excel第一个工作表名称
Private Function GetExcelSheetName(ByVal connection As OleDbConnection) As String
Try
Dim dataTable = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, Nothing)
If dataTable IsNot Nothing AndAlso dataTable.Rows.Count > 0 Then
Return dataTable.Rows(0)("TABLE_NAME").ToString()
End If
Return String.Empty
Catch
Return String.Empty
End Try
End Function4、创建一个Excel文件，这里要求为Excel第一个工作表
5、最终效果
6、完整代码如下：
Imports System.IO
Imports System.Windows.Forms
Imports System.Data.OleDb ' 使用OLEDB访问Excel
Public Class Form3
Private Sub MainForm_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
' 初始化DataGridView
DataGridView1.AllowDrop = True
DataGridView1.Columns.Add("ID", "编号")
DataGridView1.Columns.Add("Name", "名称")
' 添加图片列
Dim imgCol As New DataGridViewImageColumn
imgCol.HeaderText = "图片"
imgCol.ImageLayout = DataGridViewImageCellLayout.Zoom
DataGridView1.Columns.Add(imgCol)
End Sub
Private Sub DataGridView1_DragEnter(ByVal sender As Object, ByVal e As DragEventArgs) Handles DataGridView1.DragEnter
If e.Data.GetDataPresent(DataFormats.FileDrop) Then
Dim files As String() = CType(e.Data.GetData(DataFormats.FileDrop), String())
If files IsNot Nothing AndAlso files.Any(Function(f) _
String.Equals(Path.GetExtension(f), ".xlsx", StringComparison.OrdinalIgnoreCase)) Then
e.Effect = DragDropEffects.Copy
End If
End If
End Sub
Private Sub DataGridView1_DragDrop(ByVal sender As Object, ByVal e As DragEventArgs) Handles DataGridView1.DragDrop
Try
Dim files As String() = CType(e.Data.GetData(DataFormats.FileDrop), String())
If files IsNot Nothing AndAlso files.Length > 0 Then
Dim excelPath = files(0)
If String.Equals(Path.GetExtension(excelPath), ".xlsx", StringComparison.OrdinalIgnoreCase) Then
ReadExcelToDataGridView(excelPath)
Else
MessageBox.Show("仅支持.xlsx格式的Excel文件")
End If
End If
Catch ex As Exception
MessageBox.Show("处理失败：{0}" & ex.Message)
End Try
End Sub
' 使用OLEDB读取Excel文件
Private Sub ReadExcelToDataGridView(ByVal excelPath As String)
DataGridView1.Rows.Clear()
Dim connectionString As String = String.Format(
"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0 Xml;HDR=YES""",
excelPath)
Using connection As New OleDbConnection(connectionString)
Try
connection.Open()
Dim sheetName = GetExcelSheetName(connection)
If String.IsNullOrEmpty(sheetName) Then
MessageBox.Show("无法获取Excel工作表名称")
Return
End If
'这里指定要读取excel的工作表标签名为sheetName
Dim query = String.Format("SELECT * FROM [{0}]", sheetName)
Dim adapter As New OleDbDataAdapter(query, connection)
Dim dataTable As New DataTable()
adapter.Fill(dataTable)
' 填充DataGridView（跳过标题行）
For i As Integer = 0 To dataTable.Rows.Count - 1
Dim row = dataTable.Rows(i)
Dim id = If(IsDBNull(row(0)), "", row(0).ToString())
Dim name = If(IsDBNull(row(1)), "", row(1).ToString())
Dim imgPath = If(IsDBNull(row(2)), "", row(2).ToString())
Dim img As Image = Nothing
If Not String.IsNullOrEmpty(imgPath) AndAlso File.Exists(imgPath) Then
img = Image.FromFile(imgPath)
Else
img = My.Resources.NoImage ' 需要在项目中添加默认图片资源
End If
DataGridView1.Rows.Add(id, name, img)
Next
Catch ex As Exception
MessageBox.Show("读取Excel失败：{ex.Message}")
End Try
End Using
End Sub
' 获取Excel第一个工作表名称
Private Function GetExcelSheetName(ByVal connection As OleDbConnection) As String
Try
Dim dataTable = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, Nothing)
If dataTable IsNot Nothing AndAlso dataTable.Rows.Count > 0 Then
Return dataTable.Rows(0)("TABLE_NAME").ToString()
End If
Return String.Empty
Catch
Return String.Empty
End Try
End Function
End Class最后说明，Excel中如果使用图片的绝对路径，Excel放在任何位置都行。
