我有一个不同选择的表单，如：
public class ModuleViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
ItemClickListener itemClickListener;
public final ImageButton Actions;
public final ImageView Image;
public final TextView ModuleCode;
public final TextView ModuleDescription;
public final TextView ModuleDate;
public String ModuleIds;
public ModuleViewHolder(View itemView) {
super(itemView);
Image = (ImageView)itemView.findViewById(R.id.logo);
Actions = (ImageButton)itemView.findViewById(R.id.Actions);
//TitleModuleCode = (TextView)itemView.findViewById(R.id.TitleModuleCode);
ModuleCode = (TextView)itemView.findViewById(R.id.ModuleCode);
//TitleModuleDescription = (TextView)itemView.findViewById(R.id.TitleModuleDescription);
ModuleDescription = (TextView)itemView.findViewById(R.id.ModuleDescription);
ModuleDate = (TextView)itemView.findViewById(R.id.ModuleDate);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
this.itemClickListener.OnItemClick(view,getLayoutPosition());
// Toast.makeText(view.getContext(), "POS" + getLayoutPosition()
// , Toast.LENGTH_LONG).show();
}
public void setItemClickListener(ItemClickListener ItemClick){
this.itemClickListener = ItemClick;
}
}
public ModuleAdapter(List<Modules> Items){
this.Items = Items;
}
@Override
public int getItemCount() {
return Items.size();
}
@Override
public ModuleViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.layout_cardview,viewGroup,false);
return new ModuleViewHolder(view);
}
@Override
public void onBindViewHolder(final ModuleViewHolder ViewHolder, final int position) {
context = ViewHolder.itemView.getContext();
Typeface typeface = Typeface.createFromAsset(context.getAssets(),
"fonts/CaviarDreams.ttf");
ViewHolder.Image.setImageResource(Items.get(position).getImages());
ViewHolder.Actions.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
ShowPopupMenu(ViewHolder.Actions,position,ViewHolder);
}
});
ViewHolder.ModuleCode.setText(Items.get(position).getModule());
ViewHolder.ModuleCode.setTypeface(typeface); ViewHolder.ModuleDescription.setText(Items.get(position).getDescription());
ViewHolder.ModuleDescription.setTypeface(typeface);
ViewHolder.ModuleDate.setText(Items.get(position).getDate());
ViewHolder.ModuleDate.setTypeface(typeface);
ViewHolder.ModuleIds = Items.get(position).getModuleIds();
ViewHolder.setItemClickListener(new ItemClickListener() {
@Override
public void OnItemClick(View view, int Pos) {
//Toast.makeText(context, "POSITION :" + Pos, Toast.LENGTH_SHORT).show();
}
});
}
private void ShowPopupMenu (final View view, final int position,final ModuleViewHolder holder){
menu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()){
case R.id.action_modify:
final Connection connectionupdate = new Connection(context,Connection.DATABASE_NAME,null,
Connection.DATABASE_VERSION);
final SQLiteDatabase dbUpdate = connectionupdate.getWritableDatabase();
Typeface typeface = Typeface.createFromAsset(context.getAssets(),"fonts/CaviarDreams.ttf");
AlertDialog.Builder ModifyModule = new AlertDialog.Builder(context);
LayoutInflater modifyinflater = (LayoutInflater)context.getSystemService
(Context.LAYOUT_INFLATER_SERVICE);
final View viewmodify = modifyinflater.inflate(R.layout.layout_custom_dialog_create_modules,null);
TILM = (TextInputLayout)viewmodify.findViewById(R.id.TILM);
TILM.setTypeface(typeface);
TILD = (TextInputLayout)viewmodify.findViewById(R.id.TILD);
TILD.setTypeface(typeface);
ModuleCodeE = (EditText)viewmodify.findViewById(R.id.ModuleCode);
ModuleCodeE.setTypeface(typeface);
ModuleDescE = (EditText)viewmodify.findViewById(R.id.ModuleDesc);
ModuleDescE.setTypeface(typeface);
ModuleCodeE.setText(Items.get(position).getModule());
ModuleDescE.setText(Items.get(position).getDescription());
final String Id = Items.get(position).getModuleIds();
ModifyModule.setView(viewmodify);
ModifyModule.setIcon(R.drawable.logomini);
ModifyModule.setTitle("Construmuebles FM");
ModifyModule.setMessage(" Modifica los valores en los siguientes campos :");
ModifyModule.setPositiveButton("Actualizar", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialogInterface, int i) {
ContentValues VUpdate = new ContentValues();
VUpdate.put(Database.CamposModuloDetails.KEY_MODULE_CODE,ModuleCodeE.getText().toString()); VUpdate.put(Database.CamposModuloDetails.KEY_MODULE_DESC,ModuleDescE.getText().toString());
long IdUpdate = dbUpdate.update(Database.MODULE_DETAILS_TABLE,VUpdate,Database.CamposModuloDetails
.KEY_MODULE_DETAILS_ID + " = ?",new String []{Id});
new UpdateCardView(context,IdUpdate).execute();
dialogInterface.dismiss();
}
});
ModifyModule.setNegativeButton("Cancelar", new DialogInterface
.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
}
});
ModifyModule.show();
return true;
case R.id.action_delete:
new DeleteCardView(context,holder,position).execute();
return true;
}
return false;
}
});
menu.show();
}
class DeleteCardView extends AsyncTask<Void,Void,Long>{
private ProgressDialog pDialog;
ModuleViewHolder holder;
int position;
public DeleteCardView(Context context,ModuleViewHolder holder,int position) {
pDialog = new ProgressDialog(context);
this.holder = holder;
this.position = position;
}
@Override
protected void onPreExecute() {
pDialog.setMessage(" Eliminado registro...");
pDialog.show();
}
@Override
protected Long doInBackground(Void... voids) {
String ModuleIdCardView = holder.ModuleIds;
Connection connection = new Connection(context, Connection.DATABASE_NAME, null,
Connection.DATABASE_VERSION);
long i = connection.DeleteByIdCardView(ModuleIdCardView);
if (i != 0) {
return i;
} else {
return i;
}
}
@Override
protected void onPostExecute(Long Result) {
if (pDialog.isShowing()){
pDialog.dismiss();
Items.remove(position);
notifyItemRemoved(position);
notifyItemRangeChanged(position,Items.size());
if (Items.size()==0){ /**viewPager.setCurrentItem(0);**/ }
}
}
}
}
我的后端期望在“isConnected”属性中收到一个int。不幸的是，只要我更改了select的值，就会将该属性强制转换为字符串：
Dim rg As Range
Dim lnglastrow As Long
Dim intnamemax As Integer
Dim strName() As String
intnamemax = 21
ReDim strName(1 To intnamemax)
strName(1) = "Bob Smith"
strName(2) = "Rhys Jones"
strName(3) = "Rebecca Hickling"
lnglastrow = ActiveSheet.UsedRange.Rows.Count
For Each rg In Range("A2:A" & lnglastrow)
For i = 1 To intnamemax
Set c = rg.Find(strName(i), LookIn:=xlValues)
If Not c Is Nothing Then
MsgBox "Proxy Candidate Found at " & found.Address
Else
MsgBox "No Proxy Candidates Found ", vbOKOnly, "Success!"
End If
Next i
Next
End Sub
对于标准<select [(ngModel)]="selected.isConnected" (ngModelChange)="formChanged()" name="etat" id="etat" class="form-control">
<option value="0">Not connected</option>
<option value="1">Connected</option>
</select>
，我可以使用{
isConnected : "0", // 0 expected
}
，但对于<input>，我一无所知。
有没有办法强制角度2将数据转换为int？
答案 0 :(得分：66)
使用[ngValue]代替＆＃34;值＆＃34;：
<select [(ngModel)]="selected.isConnected" id="etat">
<option [ngValue]="0">Not connected</option>
<option [ngValue]="1">Connected</option>
</select>
答案 1 :(得分：2)
如果你想在 formChanged（）方法（你尚未提供）中使用它。 你应该使用 +符号，如下所示，
formChanged(): void {
selected.isConnected = +selected.isConnected;
...
}
答案 2 :(得分：1)
不，遗憾的是，你被迫在formChanged()方法中自行解析它，因为你总是从select获得一个字符串。
你可以尝试这样的事情：
formChanged(): void {
selected.isConnected = parseInt(selected.isConnected);
// ...
}
答案 3 :(得分：0)
您可以发送一个Number变量来选择并为该select元素指定值。然后，如果要在更改时捕获值，可以添加（更改）事件以选择并检索值，如下所示。
import { Component } from '@angular/core';
@Component({
selector: 'my-app',
template: `<select value="{{isConnected}}" (change)="printConnected($event.target.value)" name="etat" id="etat" class="form-control">
<option value="0">Not connected</option>
<option value="1">Connected</option>
</select>
<div *ngIf="changed">You've selected {{isConnected}}<div>`
})
export class AppComponent {
isConnected : number = 1;
changed : boolean = false;
printConnected(value){
this.isConnected = value;
this.changed=true;
}
}
答案 4 :(得分：0)
我使用的是反应式绑定，不想使用 [(ngModel)]。相反，我创建了一个使用 JSON.parse(value) 的管道 observable（因为 +value 不处理 "null"）：
*.component.html:
<div class="col-lg-4 form-group">
<label>Group Type</label>
<select class="form-control" (change)="groupType$.next($event.target.value)">
<option [value]="null"></option>
<option *ngFor="let groupType of filterData.groupTypes" [value]="groupType.id">{{groupType.label}}</option>
</select>
</div>
<div class="col-lg-4 form-group" *ngIf="filteredGroups$ | async as groupOptions">
<label>Group</label>
<select class="form-control" (change)="group$.next($event.target.value)">
<option [value]="null"></option>
<option *ngFor="let group of groupOptions" [value]="group.id">{{group.label}}</option>
</select>
</div>
<div class="col-lg-4 form-group">
<label>Status</label>
<select class="form-control" (change)="status$.next($event.target.value)">
<option [value]="null"></option>
<option *ngFor="let status of filterData.statuses" [value]="status.id">{{status.label}}</option>
</select>
</div>
*.component.ts:
group$ = new BehaviorSubject<string>(null);
groupId$ = this.group$.pipe(
map((groupId: string) => JSON.parse(groupId) as number)
);
groupType$ = new BehaviorSubject<string>(null);
groupTypeId$ = this.groupType$.pipe(
map((typeId: string) => JSON.parse(typeId) as number)
);
status$ = new BehaviorSubject<string>(null);
statusId$ = this.status$.pipe(
map((statusId: string) => JSON.parse(statusId) as number)
);