Why does my Xamarin.Forms.DataGrid not displaying any data?

Fourie Laing 1 Reputation point

Hi everyone,

My datagrid is not displaying any data in my datagrid
I belief it is a binding issue which I'm overlooking.

Here is my xaml code:

                    <ScrollView Orientation="Horizontal">
                        <dg:DataGrid x:Name="dgvItemDetailsGrid" ItemsSource="{Binding BuildItemDetailsData}"
                                     HeaderHeight="50" HeaderBackground="#E0E6f8"
                                     HeaderFontSize="15" ActiveRowColor="#8899AA">
                            <!--SelectedItem="{Binding ItemDetailsSelected}"-->

                                <dg:DataGridColumn Title="Doc Entry" PropertyName="DocEntryItemDetails" Width="125" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
                                <dg:DataGridColumn Title="Doc Num" PropertyName="DocNumItemDetails" Width="125" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
                                <dg:DataGridColumn Title="Item Number" PropertyName="ItemCodeItemDetails" Width="150" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
                                <dg:DataGridColumn Title="Open Quantity" PropertyName="OpenQtyItemDetails" Width="125" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
                                <dg:DataGridColumn Title="Unit of Measurement" PropertyName="UomCodeItemDetails" Width="125" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
                                <dg:DataGridColumn Title="Order Date" PropertyName="DocDateItemDetails" Width="150" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
                                <dg:DataGridColumn Title="Order Time" PropertyName="U_DRTItemDetails" Width="125" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
                                <dg:DataGridColumn Title="Weight" PropertyName="Weight1ItemDetails" Width="125" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
                                <dg:DataGridColumn Title="Original Order Quantity" PropertyName="QuantityItemDetails" 
                                                   Width="125" HorizontalContentAlignment="Center" 
                                <dg:DataGridColumn Title="Price" PropertyName="PriceItemDetails" Width="125" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
                                <dg:DataGridColumn Title="Packing" PropertyName="U_PACItemDetails" Width="125" 
                                               HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>

Here is my Model Code

public class DgvItemDetails
        public int DocEntryItemDetails { get; set; }
        public int DocNumItemDetails { get; set; }
        public string ItemCodeItemDetails { get; set; }
        public decimal OpenQtyItemDetails { get; set; }
        public string UomCodeItemDetails { get; set; }
        public DateTime DocDateItemDetails { get; set; }
        public string U_DRTItemDetails { get; set; }
        public decimal Weight1ItemDetails { get; set; }
        public decimal QuantityItemDetails { get; set; }
        public decimal PriceItemDetails { get; set; }
        public string U_PACItemDetails { get; set; }

Here is my ViewModel Code

public ObservableCollection<DgvItemDetails> BuildItemDetailsData { get; set; } = new ObservableCollection<DgvItemDetails>();

private void GetSQLFillOrderDetails()
            string Customer = string.Empty;

            using (SqlConnection connection = new SqlConnection(connectionString))

                if (selectedCustomer != "")
                    string[] CustomerName = selectedCustomer.Split(':');
                    Customer = CustomerName[0];

                    string[] OrderNr;
                    OrderNr = selectedSalesOrder.Split(':');
                    string SQLCommand = @"SELECT rdl.DocEntry AS [Doc Entry], CAST(" + OrderNr[0].Trim() + " AS int) AS [Doc Number]," +
                        "rdl.ItemCode AS [Item Number], rdl.OpenQty AS [Open Quantity], rdl.UomCode as [Unit of Measurement], " +
                        "cast(rdl.DocDate AS date) AS [Order Date], ISNULL(U_DRT,'') AS [Order Time], rdl.Weight1 AS [Weight], " +
                        "rdl.Quantity AS [Original Order Quantity], " +
                        "rdl.Price AS [Price], " +
                        "ISNULL(rdl.U_PAC,'') AS [Packing] " +
                        "FROM RDR1 rdl " +
                        "INNER JOIN ORDR ord ON(ord.DocEntry = rdl.DocEntry) " +
                        "WHERE rdl.LineStatus <> 'C' AND ord.CardCode = '" +
                        Customer + "' AND ord.DocEntry = '" + DocEntrySelected + "'";

                    using (SqlCommand command = new SqlCommand(SQLCommand, connection))
                        using (SqlDataReader reader = command.ExecuteReader())
                            if (reader != null)
                                while (reader.Read())
                                    BuildItemDetailsData.Add(new DgvItemDetails()
                                        DocEntryItemDetails = reader.GetInt32(0),
                                        DocNumItemDetails = reader.GetInt32(1),
                                        ItemCodeItemDetails = reader.GetString(2),
                                        OpenQtyItemDetails = reader.GetDecimal(3),
                                        UomCodeItemDetails = reader.GetString(4),
                                        DocDateItemDetails = reader.GetDateTime(5),
                                        U_DRTItemDetails = reader.GetString(6),
                                        Weight1ItemDetails = reader.GetDecimal(7),
                                        QuantityItemDetails = reader.GetDecimal(8),
                                        PriceItemDetails = reader.GetDecimal(9),
                                        U_PACItemDetails = reader.GetString(10)
                                Application.Current.MainPage.BindingContext = BuildItemDetailsData;
                catch (Exception ex)
                    Application.Current.MainPage.DisplayAlert("Alert", "Error Creating order item list table :", ex.Message);

Any help would be appreciated

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  1. Leon Lu (Shanghai Wicresoft Co,.Ltd.) 70,966 Reputation points Microsoft Vendor


    Welcome to our Microsoft Q&A platform!

    This issue is related to Application.Current.MainPage.BindingContext = BuildItemDetailsData; line.

    GetSQLFillOrderDetails method in the viewmodel. Please do not bindingContext in the viewmodel. Please remove it and make sure BuildItemDetailsData have items.

    And your Xamarin.Forms.DataGrid is in a ContentView. Do you want to use this ContentView in the MainPage? If so, please remove bindingContext code to the MainPage's background code or Compiled Bindings.

    Background code.

       public partial class MainPage : ContentPage  
               public MainPage()  
                   BindingContext = new MyWiewModel();  

    Or using Compiled Bindings

                   <app8:MyWiewModel  />  

    If you want to know more details about MVVM. There are lots of good docs on MVVM.

    MVVM is in the Xaml Basics docs (including a sample)

    And in learning modules:

    As well as in (old, but conceptually still valid) books:

    If you still do not know how to change your code. I can give you simple code completely .

    Best Regards,

    Leon Lu

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    1 person found this answer helpful.