Sub OpenConnection() Dim cnn As New ADODB.Connection Dim cat As New ADOX.Catalog cnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _ "Data Source= c:\Program Files\Microsoft Office\" & _ "Office\Samples\Northwind.mdb;" Set cat.ActiveConnection = cnn Debug.Print cat.Tables(0).Type '此处可循环读出表的name,type等属性 End Sub查看字段 Sub ViewFields() Dim cnn As New ADODB.Connection Dim rst As New ADODB.Recordset Dim fld As ADODB.Field Dim cat As New ADOX.Catalog ' Open the Connection cnn.Open _ "Provider=Microsoft.Jet.OLEDB.4.0;" & _ "Data Source=c:\Program Files\Microsoft Office\" & _ "Office\Samples\Northwind.mdb;" ' Open the catalog Set cat.ActiveConnection = cnn ' Set the Source for the Recordset Set rst.Source = cat.Views("AllCustomers").Command ' Retrieve Field information rst.Fields.Refresh For Each fld In rst.Fields Debug.Print fld.name & ":" & fld.Type '显示所有的字段的名称和类型 NextEnd Sub
怎样使用一个查询获得数据库对象的名称(查询/窗体/表/报表/模块/宏)? 方法一: 请详细参阅ADO参考文档中OpenSchema 如: '功能:获取access库中表的个数及表的名称 '用ado怎样实现 '工程--->引用--->Microsoft ActiveX Data Object 2.x(版本号) '---------------------------------------------------------------------------- Private Sub Form_Load() Dim adoCN As New ADODB.Connection '定义数据库的连接 Dim strCnn As New ADODB.Recordset Dim rstSchema As New ADODB.Recordset Dim I As Integer str1 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\Northwind.MDB;Persist Security Info=False" adoCN.Open str1
Set rstSchema = adoCN.OpenSchema(adSchemaTables)
Do Until rstSchema.EOF If rstSchema!TABLE_TYPE = "TABLE" Then out = out & "Table name: " & _ rstSchema!TABLE_NAME & vbCr & _ "Table type: " & rstSchema!TABLE_TYPE & vbCr I = I + 1 End If rstSchema.MoveNext Loop MsgBox I rstSchema.Close
adoCN.Close Debug.Print out End Sub方法二: Access 系统表 MsysObjects 包含了数据库对象列表, 尽管未在文档中记载, 你仍可通过查询它来获取你想要的.注: 请不要有意或无意地修改任何ACCESS系统表,否则会出现不可意料的情况.使用下列 SQL 语句来获取你想要的查询: SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)=5 ORDER BY MSysObjects.Name; 窗体: SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)=-32768 ORDER BY MSysObjects.Name; 表: SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (Left$([Name],4) <> "Msys") AND (MSysObjects.Type)=1 ORDER BY MSysObjects.Name; 报表: SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)= -32764 ORDER BY MSysObjects.Name; 模块: SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)= -32761 ORDER BY MSysObjects.Name; 宏: SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)= -32766 ORDER BY MSysObjects.Name;
Dim cat As New ADOX.Catalog cnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source= c:\Program Files\Microsoft Office\" & _
"Office\Samples\Northwind.mdb;"
Set cat.ActiveConnection = cnn
Debug.Print cat.Tables(0).Type
'此处可循环读出表的name,type等属性
End Sub查看字段
Sub ViewFields()
Dim cnn As New ADODB.Connection
Dim rst As New ADODB.Recordset
Dim fld As ADODB.Field
Dim cat As New ADOX.Catalog ' Open the Connection
cnn.Open _
"Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=c:\Program Files\Microsoft Office\" & _
"Office\Samples\Northwind.mdb;" ' Open the catalog
Set cat.ActiveConnection = cnn ' Set the Source for the Recordset
Set rst.Source = cat.Views("AllCustomers").Command ' Retrieve Field information
rst.Fields.Refresh
For Each fld In rst.Fields
Debug.Print fld.name & ":" & fld.Type
'显示所有的字段的名称和类型
NextEnd Sub
方法一: 请详细参阅ADO参考文档中OpenSchema
如:
'功能:获取access库中表的个数及表的名称
'用ado怎样实现
'工程--->引用--->Microsoft ActiveX Data Object 2.x(版本号)
'----------------------------------------------------------------------------
Private Sub Form_Load()
Dim adoCN As New ADODB.Connection '定义数据库的连接
Dim strCnn As New ADODB.Recordset
Dim rstSchema As New ADODB.Recordset
Dim I As Integer
str1 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\Northwind.MDB;Persist Security Info=False"
adoCN.Open str1
Set rstSchema = adoCN.OpenSchema(adSchemaTables)
Do Until rstSchema.EOF
If rstSchema!TABLE_TYPE = "TABLE" Then
out = out & "Table name: " & _
rstSchema!TABLE_NAME & vbCr & _
"Table type: " & rstSchema!TABLE_TYPE & vbCr
I = I + 1
End If
rstSchema.MoveNext
Loop
MsgBox I
rstSchema.Close
adoCN.Close
Debug.Print out
End Sub方法二: Access 系统表 MsysObjects 包含了数据库对象列表, 尽管未在文档中记载, 你仍可通过查询它来获取你想要的.注: 请不要有意或无意地修改任何ACCESS系统表,否则会出现不可意料的情况.使用下列 SQL 语句来获取你想要的查询:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)=5 ORDER BY MSysObjects.Name;
窗体:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)=-32768 ORDER BY MSysObjects.Name;
表:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (Left$([Name],4) <> "Msys") AND (MSysObjects.Type)=1 ORDER BY MSysObjects.Name;
报表:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)= -32764 ORDER BY MSysObjects.Name;
模块:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)= -32761 ORDER BY MSysObjects.Name;
宏:
SELECT MSysObjects.Name FROM MsysObjects WHERE (Left([Name],1)<>"~") AND (MSysObjects.Type)= -32766 ORDER BY MSysObjects.Name;