access存取bmp出现这个错误"Invalid BLOB Length"
表里只有2个字段: name(字符串类型)和bmp(OLE类型);
tab1->Open();
tab1->Append();//运行到这里出错"Invalid BLOB Length"
((TBlobField *)(tab1->FieldValues["bmp"]))->LoadFromFile(txtFilename->Text);
String str = ExtractFileName(txtFilename->Text);
tab1->FieldValues["name"] = str;
tab1->Post();
tab1->Close();