VC ADO ACCESS 获取列名
BOOL GetAllFields(_RecordsetPtr m_pRecordset,CStringArray & fieldsarray)
{
if (m_pRecordset)
{
if (m_pRecordset->State)
{
try
{
HRESULT hr;
Fields * fields = NULL;
hr = m_pRecordset->get_Fields (&fields);
long ColCount;
if(SUCCEEDED(hr))
fields->get_Count(&ColCount);
for(long i=0;i<ColCount;i++)
{
Field * field = NULL;
field = fie
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Failed to access IIS metabase.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.Hosting.HostingEnvironmentException: ......
Option Explicit
Private Sub Form_Load()
'工程->引用->选中Microsoft ActiveX Data Objects 2.8 Library
Dim shujukulianjie As New ADODB.Connection
Dim jiluji As New ADODB.Recordset
'连接数据库的代码段
shujukulianjie.Open "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;Data Sour ......
----比较复杂的数据库中一般会有位图数据(比如相片)。虽然这类“OLE对象”的插入、删除以及替换操作在ACCESS里容易实现,在VC中却显得复杂而且颇费周折。以下把作者用VC处理ACCESS数据库中的位图数据的体会简单叙述一下,以请教于大家。
----在CdaoRecordset派生类的对象中,VC自动为ACCESS的“OLE对象&r ......
(一)把文件内容写入Access数据库的OLE对象字段中:
if (File.Exists(txtBrow.Text) != false) // 文本框txtBrow中内容为文件路径及文件名
{
//获取文件后缀
FileInfo p = new FileInfo(txtBrow.Text.Trim());
F_str_Type = ......
<connectionStrings>
<add name="qxConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Web/App_Data/db2.mdb;" providerName="System.Data.OleDb"/>
</connectionStrings> ......