[英]Uploading files to SQL Server 2012 with ASP.NET/VB.NET
我按照教程运行了以下代码,没有任何错误。 文件“上传”,但没有数据插入我的SQL Server表。
应将数据插入content
表中。
内容表:
Document.aspx
Imports System.Data.SqlClient
Imports System.Data
Imports System.IO
Partial Class Documents
Inherits System.Web.UI.Page
Protected Sub btnUploadContent_Click(sender As Object, e As EventArgs) Handles btnUploadContent.Click
Dim filePath As String = FileUpload.PostedFile.FileName
Dim filename As String = Path.GetFileName(filePath)
Dim ext As String = Path.GetExtension(filename)
Dim contenttype As String = String.Empty
Select Case ext
Case ".doc"
contenttype = "application/vnd.ms-word"
Exit Select
Case ".docx"
contenttype = "application/vnd.ms-word"
Exit Select
Case ".xls"
contenttype = "application/vnd.ms-excel"
Exit Select
Case ".xlsx"
contenttype = "application/vnd.ms-excel"
Exit Select
Case ".jpg"
contenttype = "image/jpg"
Exit Select
Case ".png"
contenttype = "image/png"
Exit Select
Case ".gif"
contenttype = "image/gif"
Exit Select
Case ".pdf"
contenttype = "application/pdf"
Exit Select
End Select
If contenttype <> String.Empty Then
Dim fs As Stream = FileUpload.PostedFile.InputStream
Dim br As New BinaryReader(fs)
Dim bytes As Byte() = br.ReadBytes(fs.Length)
'insert the file into database
Dim strQuery As String = "INSERT INTO content (content_name, content_type, content_file) VALUES (@Name, @ContentType, @Data)"
Dim cmd As New SqlCommand(strQuery)
cmd.Parameters.Add("@Name", SqlDbType.VarChar).Value = filename
cmd.Parameters.Add("@ContentType", SqlDbType.VarChar).Value() = contenttype
cmd.Parameters.Add("@Data", SqlDbType.Binary).Value = bytes
InsertUpdateData(cmd)
lblMessage.ForeColor = System.Drawing.Color.Green
lblMessage.Text = "File Uploaded Successfully"
Else
lblMessage.ForeColor = System.Drawing.Color.Red
lblMessage.Text = "File format not recognised." + " Upload Image/Word/PDF/Excel formats"
End If
End Sub
Public Function InsertUpdateData(ByVal cmd As SqlCommand) As Boolean
Dim strConnString As String = System.Configuration.ConfigurationManager.ConnectionStrings("ConnStringDb1").ConnectionString()
Dim conn As New SqlConnection("Data Source=BRIAN-PC\SQLEXPRESS;Initial Catalog=master_db;Integrated Security=True;")
cmd.CommandType = CommandType.Text
cmd.Connection = conn
Try
conn.Open()
cmd.ExecuteNonQuery()
Return True
Catch ex As Exception
Response.Write(ex.Message)
Return False
Finally
conn.Close()
conn.Dispose()
End Try
End Function
End Class
谁能告诉我发生了什么事?
编辑: 调试断点@ InsertUpdateData(cmd)
:
SqlDbType.Binary Binary {1} System.Data.SqlDbType
+ bytes {Length=4136752} Byte()
+ cmd {System.Data.SqlClient.SqlCommand} System.Data.SqlClient.SqlCommand
+ cmd.Parameters {System.Data.SqlClient.SqlParameterCollection} System.Data.SqlClient.SqlParameterCollection
我已经创建了空数据库并添加了表格内容 ,就像你一样,我使用的代码几乎和你一样,并且工作正常。
同样,如果没有异常发生,请检查您的连接字符串,看看是否已将行添加到连接字符串中指定的db中的表中。 这是我的代码(工作正常),有点修改你的:
Imports System.Data.SqlClient
Imports System.IO
Public Class _Default
Inherits System.Web.UI.Page
Protected Sub btnUploadContent_Click(sender As Object, e As EventArgs) Handles btnTest1.Click
Dim fs As Stream = FileUpload.PostedFile.InputStream
Dim br As New BinaryReader(fs)
Dim bytes As Byte() = br.ReadBytes(fs.Length)
'insert the file into database
Dim strQuery As String = "INSERT INTO content (content_name, content_type, content_file) VALUES (@Name, @ContentType, @Data)"
Dim cmd As New SqlCommand(strQuery)
cmd.Parameters.Add("@Name", SqlDbType.VarChar).Value = "filename"
cmd.Parameters.Add("@ContentType", SqlDbType.VarChar).Value() = "jpg"
cmd.Parameters.Add("@Data", SqlDbType.Binary).Value = bytes
InsertUpdateData(cmd)
End Sub
Public Function InsertUpdateData(ByVal cmd As SqlCommand) As Boolean
Dim conn As New SqlConnection("Data Source=(local);Initial Catalog=test;Integrated Security=True;")
cmd.CommandType = CommandType.Text
cmd.Connection = conn
Try
conn.Open()
cmd.ExecuteNonQuery()
Return True
Catch ex As Exception
Response.Write(ex.Message)
Return False
Finally
conn.Close()
conn.Dispose()
End Try
End Function
End Class
我添加了SQL样本来测试DB:
INSERT INTO [master_db].[dbo].[content]
([content_name]
,[content_type]
,[content_file])
VALUES
('test'
,'png'
,0x111111111111111)
SELECT * FROM [master_db].[dbo].[content]
我看到这个帖子正在寻找一个例子。 我使用了您发布的示例代码并遇到了同样的问题。 我发现并解决了以下问题并使其正常工作:
希望能帮助下一个停下来的人....
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