setting selected db name in drop down to current connection db name (#11912)

extensions/notebook/src/dialog/managePackages/installedPackagesTab.ts

@@ -170,16 +170,18 @@ export class InstalledPackagesTab {
 			component = view.modelBuilder.text().withProperties({
 				value: locations[0].displayName
 			}).component();
-		} else if (locations) {
+		} else if (locations && locations.length > 1) {
 			let dropdownValues = locations.map(x => {
 				return {
 					name: x.name,
 					displayName: x.displayName
 				};
 			});
+			const currentLocation = await dialog.model.getCurrentLocation();
+			const selectedLocation = dropdownValues.find(x => x.name === currentLocation);
 			let locationDropDown = view.modelBuilder.dropDown().withProperties({
 				values: dropdownValues,
-				value: dropdownValues[0]
+				value: selectedLocation || dropdownValues[0]
 			}).component();
 
 			locationDropDown.onValueChanged(async () => {

extensions/notebook/src/dialog/managePackages/managePackagesDialogModel.ts

@@ -213,7 +213,9 @@ export class ManagePackagesDialogModel {
 	 * Changes the current location
 	 */
 	public changeLocation(location: string): void {
-		this._currentLocation = location;
+		if (location) {
+			this._currentLocation = location;
+		}
 	}
 
 	/**
@@ -240,6 +242,19 @@ export class ManagePackagesDialogModel {
 		return Promise.resolve(undefined);
 	}
 
+	/**
+	 * Returns the current location for current provider
+	 */
+	public async getCurrentLocation(): Promise<string | undefined> {
+		if (!this._currentLocation) {
+			let provider = this.currentPackageManageProvider;
+			if (provider) {
+				return await provider.getCurrentLocation();
+			}
+		}
+		return Promise.resolve(this._currentLocation);
+	}
+
 	/**
 	 * UnInstalls given packages using current provider
 	 * @param packages Packages to install