在导入数据到sde之前判断sde是否安装，以及sde许可是否可用

IAoInitialize --- ESRI.ArcGIS.esriSystem.IAoInitialize

private void pd（）

{

 IAoInitialize m_AoInitialize = new AoInitializeClass();
            if (m_AoInitialize == null)
            {
                System.Windows.Forms.MessageBox.Show("没有安装ArcEngine,系统无法运行!");
                return false;
            }
            esriLicenseStatus licenseStatus = (esriLicenseStatus)m_AoInitialize.IsProductCodeAvailable(esriLicenseProductCode.esriLicenseProductCodeEngineGeoDB);
            if (licenseStatus == esriLicenseStatus.esriLicenseAvailable)
            {
                licenseStatus = (esriLicenseStatus)m_AoInitialize.Initialize(esriLicenseProductCode.esriLicenseProductCodeEngineGeoDB);
                if (licenseStatus != esriLicenseStatus.esriLicenseCheckedOut)
                {
                    System.Windows.Forms.MessageBox.Show("缺少GDB许可，请重新安装ArcEngine!");
                    return false;
                }
            }
            else
            {
                System.Windows.Forms.MessageBox.Show("缺少GDB许可，请重新安装ArcEngine!");
                return false;
            }

}