如何使用vba從excel中檢索數據庫中的pdf文件（varbinary max）

Question

我不知道如何通過excel vba從數據庫檢索或提取pdf文件嗎？ （在c＃中有很多幫助，asp ......）

存儲在SQL Server Databse的varbinary max type字段中的文件。

我可以連接或通過VBA後從該記錄訪問記錄如何提取它

Answer 1

Dim cn As ADODB.Connection 
Dim rs As ADODB.Recordset 
Dim sql As String 
Dim oStream As ADODB.Stream 

Set cn = New ADODB.Connection 

'Here I use default admin user 'sa' and password is blank 
cn.Open "Provider = sqloledb;" & _ 
     "Data Source=ServerNameOrIP;" & _ 
     "Initial Catalog=DBName;" & _ 
     "User ID=sa;" & _ 
     "Password=;""" 

'your sql statment including varbinary max field here it is FILEDATA 
sql = " select EMAILID,EMAILFROM,EMAILTO,EMAILSUBJECT,FILEDATA from Tbl " 


Set rs = New ADODB.Recordset 

rs.Open sql, cn 

Do Until rs.EOF 
    Set oStream = New ADODB.Stream 
    With oStream 
     .Type = adTypeBinary 
     .Open 
     .Write rs.Fields(4).Value 
     'Here I use 1st field value as file name i.e. rs.fiedls(0).value 
     'In addition you can join drive and/or folder path to save another location 
     .SaveToFile rs.Fields(0).Value & ".pdf", adSaveCreateOverWrite 
     .Close 
    End With 
    Set oStream = Nothing 
    rs.MoveNext 
Loop 


rs.Close 
cn.Close