Merge pull request #891 from Hexastack/fix/empty-file-when-no-dataset-is-selected

fix: empty file when no dataset is selected

frontend/src/components/nlp/components/NlpSample.tsx

@@ -392,6 +392,7 @@ export default function NlpSample() {
                   `nlpsample/export${type ? `?type=${type}` : ""}`,
                 )}
                 startIcon={<DownloadIcon />}
+                disabled={dataGridProps?.rows?.length === 0}
               >
                 {t("button.export")}
               </Button>