我想有多个下拉列表来过滤同一页面上的表格。当您转到页面时,它会在您选择第一个下拉列表时显示一个表格,它会缩小数据并更新第二个下拉列表。
以下是我在MVC Sort headers and Dropdown Ajax update
上工作的示例我可以让级联下拉列表正常工作,或者我可以让表格更新,但我无法获得两者。
我正在尝试使用ajax,因此页面无法重新加载。
任何指导或示例都会很棒!
答案 0 :(得分:0)
我还没有看到你的代码,所以无法确切地说出问题。以下是我看到您的解决方案的方式。首先将第二个下拉值添加到过滤器方法中,未选择时应该具有默认值。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_login"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
tools:context="in.thoughtsmith.jobsmith.LoginActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/MessageText"
android:visibility="invisible"/>
<com.google.android.gms.common.SignInButton
android:id="@+id/Sign_In_Button"
android:layout_width="200dp"
android:layout_height="wrap_content"
/>
<Button
android:layout_width="200dp"
android:layout_height="wrap_content"
android:text="@string/ProceedWithoutLogIn"
android:onClick="proceedWithOutLogin"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Logout"
android:id="@+id/LogoutButton"
android:onClick="logout"
android:visibility="invisible"/>
</LinearLayout>
然后检查是否选择了第二个,在这种情况下是否为0,并过滤
import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.signin.GoogleSignInResult;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
public class LoginActivity extends AppCompatActivity implements
View.OnClickListener, GoogleApiClient.OnConnectionFailedListener {
GoogleSignInOptions googleSignInOptions;
GoogleApiClient googleApiClient;
private final int REQUEST_CODE = 1;
TextView messageTextView;
SignInButton signInButton;
Button logoutButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
messageTextView = (TextView) findViewById(R.id.MessageText);
signInButton = (SignInButton) findViewById(R.id.Sign_In_Button);
signInButton.setOnClickListener(this);
logoutButton = (Button) findViewById(R.id.LogoutButton);
logoutButton.setOnClickListener(this);
googleSignInOptions = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestEmail()
.build();
googleApiClient = new GoogleApiClient.Builder(this)
.enableAutoManage(this, this)
.addApi(Auth.GOOGLE_SIGN_IN_API, googleSignInOptions)
.build();
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.Sign_In_Button:
Intent intent = Auth.GoogleSignInApi.getSignInIntent(googleApiClient);
startActivityForResult(intent, REQUEST_CODE);
break;
case R.id.LogoutButton:
Auth.GoogleSignInApi.signOut(googleApiClient).setResultCallback(new ResultCallback<Status>() {
@Override
public void onResult(@NonNull Status status) {
messageTextView.setText("SuccessfullyLogout");
logoutButton.setVisibility(View.INVISIBLE);
}
});
break;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE) {
GoogleSignInResult googleSignInResult = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
hanleSigninIntent(googleSignInResult);
}
}
public void hanleSigninIntent(GoogleSignInResult googleSignInResult) {
if (googleSignInResult.isSuccess()) {
GoogleSignInAccount userAccount = googleSignInResult.getSignInAccount();
updateUi(getString(R.string.WelcomeMessage) + " " + userAccount.getDisplayName());
logoutButton.setVisibility(View.VISIBLE);
} else {
updateUi(getString(R.string.UserNameOrPasswordWrong));
}
}
public void updateUi(String message) {
messageTextView.setText(message);
messageTextView.setVisibility(View.VISIBLE);
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Toast.makeText(this, "OnConnectionFailed", Toast.LENGTH_SHORT);
}
}
添加另一个方法,返回第二个方法的项目列表,并在更改第一个下拉值时调用它。最佳选项是JSON格式的返回值。 这是我的代码,我在更改类别时更新子类别列表
public ActionResult Index(string sortOrder, string id,
string channelLocation, int secon_ddl = 0)
我正在使用jquery数据表,因此更新表很简单
if(secon_ddl != 0)
{
//do whatever
}
在你的情况下,这最后一个代码应该是完全不同的。只需确保您的过滤器mehtod接收到两个下拉列表的值,并在其中一个下拉列表更改时触发。希望这可以帮助你!!