WPF Datagrid set selected row

Question

How do I use the Datagrid SelectedItem to select a row programmatically   Do I first have to create a IEnumerable of DataGridRow objects and pass the matching row to this SelectedItem property or how do I do it   EDIT   I need to match the cell content of the first columns cell with a TextBox Text first  before selecting the row

User · Answer

In General to Access all rows     foreach  var item in dataGrid1 Items        string str     DataRowView dataGrid1 Items 1   Row  ColumnName   ToString          To Access Selected Rows     private void dataGrid1 SelectionChanged object sender  SelectionChangedEventArgs e        try               string str     DataRowView dataGrid1 SelectedItem  Row  ColumnName   ToString              catch  Exception ex                MessageBox Show ex Message

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If anyone stumblng here has problems with internal grid selection happening after OnSelectionChanged - after unsuccessfully trying out all the selection setters for a dozen hours the only thing that worked for me was reloading and repopulating DataGrid along with selected item  Not elegant at all  but at this point I m not sure if a better solution exists in my situation   datagrid ItemsSource   null datagrid ItemsSource   items  datagrid SelectedItem   selectedItem

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I came across this fairly recent  compared to the age of the question  TechNet article that includes some of the best techniques I could find on the topic   WPF  Programmatically Selecting and Focusing a Row or Cell in a DataGrid  It includes details that should cover most requirements  It is important to remember that if you specify custom templates for the DataGridRow for some rows that these won t have DataGridCells inside and then the normal selection mechanisms of the grid doesn t work   You ll need to be more specific on what datasource you ve given the grid to answer the first part of your question  as the others have stated

User · Answer

please check if code below would work for you  it iterates through cells of the datagris s first column and checks if cell content equals to the textbox text value and selects the row   for  int i   0  i  lt  dataGrid Items Count  i          DataGridRow row    DataGridRow dataGrid ItemContainerGenerator ContainerFromIndex i       TextBlock cellContent   dataGrid Columns 0  GetCellContent row  as TextBlock      if  cellContent    null  amp  amp  cellContent Text Equals textBox1 Text                 object item   dataGrid Items i           dataGrid SelectedItem   item          dataGrid ScrollIntoView item           row MoveFocus new TraversalRequest FocusNavigationDirection Next            break            hope this helps  regards

User · Answer

I ve searched solution to similar problem and maybe my way will help You and anybody who face with it   I used  SelectedValuePath  id  in XAML DataGrid definition  and programaticaly only thing I have to do is set DataGrid SelectedValue to desired value   I know this solution has pros and cons  but in specific case is fast and easy   Best regards  Marcin

User · Answer

You don t need to iterate through the DataGrid rows  you can achieve your goal with a more simple solution  In order to match your row you can iterate through you collection that was bound to your DataGrid ItemsSource property then assign this item to you DataGrid SelectedItem property programmatically  alternatively you can add it to your DataGrid SelectedItems collection if you want to allow the user to select more than one row  See the code below    lt Window x Class  ProgGridSelection MainWindow      xmlns  http   schemas microsoft com winfx 2006 xaml presentation      xmlns x  http   schemas microsoft com winfx 2006 xaml      Title  MainWindow  Height  350  Width  525  Loaded  OnWindowLoaded  gt   lt StackPanel gt       lt DataGrid Name  empDataGrid  ItemsSource   Binding   Height  200   gt       lt TextBox Name  empNameTextBox   gt       lt Button Content  Click  Click  OnSelectionButtonClick    gt   lt  StackPanel gt      public partial class MainWindow   Window       public class Employee               public string Code   get  set            public string Name   get  set               private ObservableCollection lt Employee gt   empCollection       public MainWindow                 InitializeComponent               private void OnWindowLoaded object sender  RoutedEventArgs e                   Generate test data          empCollection               new ObservableCollection lt Employee gt                                        new Employee  Code    E001   Name    Mohammed A  Fadil                        new Employee  Code    E013   Name    Ahmed Yousif                        new Employee  Code    E431   Name    Jasmin Kamal                                   Set the Window DataContext  alternatively you can set your            DataGrid DataContext property to the employees collection             on the other hand  you you have to bind your DataGrid            DataContext property to the DataContext  see the XAML code                      DataContext    empCollection             private void OnSelectionButtonClick object sender  RoutedEventArgs e                   select the employee that his name matches the            name on the TextBox                     var emp    from i in  empCollection                    where i Name    empNameTextBox Text Trim                      select i  FirstOrDefault                Now  to set the selected item on the DataGrid you just need            assign the matched employee to your DataGrid SeletedItem            property  alternatively you can add it to your DataGrid            SelectedItems collection if you want to allow the user            to select more than one row  e g                 empDataGrid SelectedItems Add emp                       if  emp    null              empDataGrid SelectedItem   emp

User · Answer

It s a little trickier to do what you re trying to do than I d prefer  but that s because you don t really directly bind a DataGrid to a DataTable     When you bind DataGrid ItemsSource to a DataTable  you re really binding it to the default DataView  not to the table itself   This is why  for instance  you don t have to do anything to make a DataGrid sort rows when you click on a column header - that functionality s baked into DataView  and DataGrid knows how to access it  through the IBindingList interface    The DataView implements IEnumerable lt DataRowView gt   more or less   and the DataGrid fills its items by iterating over this   This means that when you ve bound DataGrid ItemsSource to a DataTable  its SelectedItem property will be a DataRowView  not a DataRow   If you know all this  it s pretty straightforward to build a wrapper class that lets you expose properties that you can bind to   There are three key properties    Table  the DataTable  Row  a two-way bindable property of type DataRowView  and  SearchText  a string property that  when it s set  will find the first matching DataRowView in the table s default view  set the Row property  and raise PropertyChanged    It looks like this   public class DataTableWrapper   INotifyPropertyChanged       private DataRowView  Row       private string  SearchText       public DataTableWrapper                    using a parameterless constructor lets you create it directly in XAML         DataTable t   new DataTable            t Columns Add  id   typeof  int            t Columns Add  text   typeof  string                let s acquire some sample data         t Rows Add new object     1   Tower             t Rows Add new object     2   Luxor              t Rows Add new object     3   American              t Rows Add new object     4   Festival              t Rows Add new object     5   Worldwide              t Rows Add new object     6   Continental              t Rows Add new object     7   Imperial               Table   t                 you should have this defined as a code snippet if you work with WPF     private void OnPropertyChanged string propertyName                PropertyChangedEventHandler h   PropertyChanged          if  h    null                        h this  new PropertyChangedEventArgs propertyName                         public event PropertyChangedEventHandler PropertyChanged          SelectedItem gets bound to this two-way     public DataRowView Row               get   return  Row            set                       if   Row    value                                 Row   value                  OnPropertyChanged  Row                                          the search TextBox is bound two-way to this     public string SearchText               get   return  SearchText            set                       if   SearchText    value                                 SearchText   value                  Row   Table DefaultView OfType lt DataRowView gt                         Where x   gt  x Row Field lt string gt   text   Contains  SearchText                        FirstOrDefault                                       public DataTable Table   get  private set        And here s XAML that uses it    lt Window x Class  DataGridSelectionDemo MainWindow          xmlns  http   schemas microsoft com winfx 2006 xaml presentation          xmlns x  http   schemas microsoft com winfx 2006 xaml           xmlns dg  clr-namespace Microsoft Windows Controls assembly WPFToolkit          xmlns DataGridSelectionDemo  clr-namespace DataGridSelectionDemo           Title  DataGrid selection demo           Height  350           Width  525  gt       lt Window DataContext gt           lt DataGridSelectionDemo DataTableWrapper   gt       lt  Window DataContext gt       lt DockPanel gt           lt Grid DockPanel Dock  Top  gt           lt Grid ColumnDefinitions gt                   lt ColumnDefinition Width  Auto    gt                   lt ColumnDefinition Width       gt               lt  Grid ColumnDefinitions gt               lt Label gt Text lt  Label gt               lt TextBox Grid Column  1                        Text   Binding SearchText  Mode TwoWay     gt           lt  Grid gt           lt dg DataGrid DockPanel Dock  Top                       ItemsSource   Binding Table                        SelectedItem   Binding Row  Mode TwoWay     gt       lt  DockPanel gt   lt  Window gt

User · Answer

I have changed the code of serge gubenko and it works better   for  int i   0  i  lt  dataGrid Items Count  i          string txt   searchTxt Text      dataGrid ScrollIntoView dataGrid Items i        DataGridRow row    DataGridRow dataGrid ItemContainerGenerator ContainerFromIndex i       TextBlock cellContent   dataGrid Columns 1  GetCellContent row  as TextBlock      if  cellContent    null  amp  amp  cellContent Text ToLower   Equals txt ToLower                   object item   dataGrid Items i           dataGrid SelectedItem   item          dataGrid ScrollIntoView item           row MoveFocus new TraversalRequest FocusNavigationDirection Next            break

[wpf] WPF Datagrid set selected row

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