feat(MaxLen ): set default MaxLen

client/components/DeviceMap.vue

@@ -128,7 +128,7 @@ export default {
         CodeInPacs: "",
         Modality: "",
         HisLinkId: "",
-        MaxLen: "",
+        MaxLen: 0,
         _id: ""
       },
       snackbar: false,
@@ -203,6 +203,7 @@ export default {
     openNewDialog() {
       for (let prop in this.DevicemapForm) {
         this.$set(this.DevicemapForm, prop, "");
+        if (prop == "MaxLen") this.$set(this.DevicemapForm, prop, 0);
       }
       this.selectedClient = undefined;
       this.selectedHisLink = undefined;