diff --git a/projects/ucap-webmessenger-api/src/lib/utils/parameter.util.ts b/projects/ucap-webmessenger-api/src/lib/utils/parameter.util.ts
index 96c8602e..ab29f31e 100644
--- a/projects/ucap-webmessenger-api/src/lib/utils/parameter.util.ts
+++ b/projects/ucap-webmessenger-api/src/lib/utils/parameter.util.ts
@@ -14,14 +14,50 @@ export class ParameterUtil {
       if (!param.hasOwnProperty(key)) {
         return;
       }
-      if (!!param[key]) {
-        parameter[parameterMap[key]] = param[key];
-      }
+
+      let v: any;
       if (!!extraParam && !!extraParam[key]) {
-        parameter[parameterMap[key]] = extraParam[key];
+        v = extraParam[key];
+      } else if (!!param[key]) {
+        v = param[key];
+      }
+
+      if (!!v) {
+        parameter[parameterMap[key]] = v;
       }
     });
 
     return 0 === Object.keys(parameter).length ? null : parameter;
   }
+
+  public static encodeFormData(
+    parameterMap: {},
+    param: {},
+    extraParam?: {}
+  ): FormData {
+    const formData: FormData = new FormData();
+
+    Object.keys(parameterMap).map(key => {
+      if (!param.hasOwnProperty(key)) {
+        return;
+      }
+
+      let v: any;
+      if (!!extraParam && !!extraParam[key]) {
+        v = extraParam[key];
+      } else if (!!param[key]) {
+        v = param[key];
+      }
+
+      if (!!v) {
+        if (v instanceof File) {
+          formData.append(parameterMap[key], v, v.name);
+        } else {
+          formData.append(parameterMap[key], v);
+        }
+      }
+    });
+
+    return formData;
+  }
 }