在點擊事件中捕獲條目值

Question

我有一個使用c＃添加到我的xamarin.forms應用程序的入口控件。 我也有一個工具欄項目，單擊它我想保存用戶輸入的數據。

我無法在點擊事件中訪問文本值，出現以下錯誤：

Error 20 The name 'txtTest' does not exist in the current context

這是我的代碼示例：

public SettingsPage()
{

ToolbarItem Settings = new ToolbarItem();
Settings.Name = "Settings";
Settings.Clicked += OnClick_Settings;
Settings.Order = ToolbarItemOrder.Primaru;

ToolbarItems.Add(Settings);
loadData();
}

async public void loadData()
{
    Label lblTest = new Label { Text = "Test", FontAttributes = FontAttributes.Bold };
    Entry txtTest = new Entry();

    StackLayout stLTest = new StackLayout
    {
        Padding = new Thickness(10, 0, 0, 0),
        Children ={ 
            lblTest,
            txtTest
        }
    };  
    Content = stTest
}

async private void OnClick_Settings(object sender, EventArgs e)
{
    var test= txtTest.Text;
}

在我的OnClick_Settings ，找不到文本值。

Answer 1

您在loadData()方法中具有txtTest 。 您應該將其移出那里。

做這個

Entry txtTest;    
async public void loadData()
{
    Label lblTest = new Label { Text = "Test", FontAttributes = FontAttributes.Bold };
    txtTest = new Entry();

    StackLayout stLTest = new StackLayout
    {
        Padding = new Thickness(10, 0, 0, 0),
        Children ={ 
            lblTest,
            txtTest
        }
    };  
    Content = stTest
}