Question

我已经采取了一个文本框，一个文本块和一个按钮来执行天蓝色移动服务表中的搜索类型...我在文本框中输入了人的用户名，当我点击按钮时我想获得名字在文本框中，其用户名是在textbox ..m中给出的，所以不知道该怎么做...请帮助我..我试过以下代码，但它不起作用

private async void search_click(object sender, RoutedEventArgs e)
 {
        MobileServiceCollection<UserData, UserData> data;
        IMobileServiceTable<UserData> dataTable = App.MobileService.GetTable<UserData>();

        try
        {
            showBlock.Text = "searching.....";
            statusBar.IsIndeterminate = true;
            searchButton.IsEnabled = false;
            if (searchBox.Text != "")
            {
                tempUnamePhone = await App.MobileService.GetTable<UserData>().Where(x => x.uname == searchBox.Text || x.phone == searchBox.Text).ToListAsync();
               data = await dataTable.Where(x => x.uname == searchBox.Text).Select(x=>x.fname).ToCollectionAsync();


            }
            if (tempUnamePhone.Count != 0)
            {
                showBlock.Text = "item found"+fname;
                statusBar.IsIndeterminate = false;
                searchButton.IsEnabled = true;
            }
            else
            {

                showBlock.Text = "no match found";

                statusBar.IsIndeterminate = false;
                searchButton.IsEnabled = true;
            }
        }
        catch (Exception )
        {
            var m = new MessageDialog("Network error..close the app and try again" ).ShowAsync();
        }

    }
    }

Answer 1

var fname = string.Empty;
if (searchBox.Text != "")
        {
            tempUnamePhone = await App.MobileService.GetTable<UserData>().Where(x => x.uname == searchBox.Text || x.phone == searchBox.Text).ToListAsync();
            fname =tempUnamePhone.Where(x => x.uname == searchBox.Text).FirstOrDefault() == null ? string.Empty : await dataTable.Where(x => x.uname == searchBox.Text).First().fname;

此处匹配的记录将作为集合获取。我没有看到从集合中找到fname的代码。我相信fname旨在存储匹配记录中的第一个名字。您必须检查“数据”中是否返回任何记录，然后将第一条记录分配给“fname＆＃39;”，然后设置为文本块

         if (tempUnamePhone.Count != 0)
        {
            showBlock.Text = "item found" + fname;      
            statusBar.IsIndeterminate = false;
            searchButton.IsEnabled = true;
        }
        else
        {

            showBlock.Text = "no match found";

            statusBar.IsIndeterminate = false;
            searchButton.IsEnabled = true;
        }

想要使用linq从azure移动服务表的特定列获取数据

1 个答案: