private void ReplaceImage() { string imgName = this.brandModel.BrandId + "1" + Path.GetExtension(this.tbImage.Text); var contentBytes = File.ReadAllBytes(this.tbImage.Text); string imgContent = Convert.ToBase64String(contentBytes); var replaceRes = WebRequestUtil.ReplaceBrandImg(this.previousImg, imgName, imgContent); if (replaceRes != null) { LogUtil.Info("AddUpdateBrandFrm.ReplaceImage successfully!"); } else { LogUtil.Error("AddUpdateBrandFrm.ReplaceImage failed!replaceRes is null!"); } }