private void btnBase64Bmp_ToBmp_Click(object sender, EventArgs e) { if (string.IsNullOrWhiteSpace(rtxtBase64BmpStr.Text)) { rtxtBase64BmpStr.Focus(); } else { try { if (picBoxBase64Bmp.Image != null) { picBoxBase64Bmp.Image.Dispose(); picBoxBase64Bmp.Image = null; } picBoxBase64Bmp.Image = Base64Helper.Base64ToImg(rtxtBase64BmpStr.Text.Replace("data:image/png;base64,", "")); } catch (Exception ex) { WinFormHelper.ShowError(ex); } } }