Question on SearchHelper

[Helmut Wahrmann]

Hi,

i have 2 questions on SearchHelper:

1. Can it be used in a MVVM Viewmodel? i.e. without using Code behind

2. Is there also a Replace function, which would allow me to replace the found string? couldn't find one

thanks,

Helmut

[Susmitha Sundar]

Hi Helmut, 

 

Thank you for using Syncfusion controls. 

 

You can use the SearchHelper with MVVM pattern (without code behind). Please refer the below sample link, 

 

Sample : https://github.com/syncfusion/wpf-demos/tree/master/DataGrid/SearchPanel 

We don’t have a built-in support for Replace function. But we have a wort around for this. Please refer the below code, 

void OnReplaceButton_Click(object sender, RoutedEventArgs e) 

{ 

     var item = this.ComboBox.SelectedItem; 

     if (item == null) 

         return; 

     var grid = this.GetDataGrid(item.ToString()); 

     var searchText = this.SearchTextBox.Text.ToUpper(); 

     foreach (RecordEntry record in grid.View.Records) 

     { 

         if ((record.Data as OrderInfo).CustomerID.Contains(searchText)) 

         { 

             (record.Data as OrderInfo).CustomerID = (record.Data as OrderInfo).CustomerID.Replace(searchText, this.ReplaceTextBox.Text); 

         } 

     } 

 

     grid.SearchHelper.Search(ReplaceTextBox.Text); 

     this.SearchTextBox.Clear(); 

     this.ReplaceTextBox.Clear(); 

     grid.View.Refresh();  

 } 

Sample link: https://www.syncfusion.com/downloads/support/forum/152034/ze/SearchAndReplace-1226469410 

Please check the sample and let us know if you need further assistance on this. 

Regards, 

Susmitha S 

[Helmut Wahrmann]

Hi Susmitha,

thanks for the answer. But with your solution i would need to loop through my collection and do a replace on all fields.
I don't need a searchhelper functionality for that. I could do that on my own.

I had a look at searchhelper and found that the "Findnext" updates CurrentRowColumnIndex.

With that and having a look at the "Edit" section for SfDatagrid, i came up with:

            grid.SearchHelper.FindNext(SearchTextBox.Text);

            var index = grid.SearchHelper.CurrentRowColumnIndex;

            if (index.RowIndex > -1)

            {

                var recordIndex = grid.ResolveToRecordIndex(index.RowIndex);

                var columnIndex = grid.ResolveToGridVisibleColumnIndex(index.ColumnIndex);

                var mappingName = grid.Columns[columnIndex].MappingName;

                var record = grid.View.Records.GetItemAt(recordIndex);

                var cellValue = grid.View.GetPropertyAccessProvider().GetValue(record, mappingName);

                var replacedString = (cellValue as string).Replace(SearchTextBox.Text, ReplaceTextBox.Text);

                grid.View.GetPropertyAccessProvider().SetValue(record, mappingName, replacedString);

            }

this works perfect.

thanks,

Helmut

[Susmitha Sundar]

Hi Helmut, 

 

Thanks for the update. 

 

We are glad to know that the reported problem has been resolved at your end. Please let us know if you have any further queries on this. We are happy to help you. 

 

Regards, 

Susmitha S 

[Dirk Tetenberg]

Hi Susmitha,

The link for the SearchHelper MVVM pattern example is dead. Can you please provide a new one? Many thanks.

Regards,

Dirk

[Mohanram Anbukkarasu]

Hi Dirk, 

Thanks for the update.  

You can get the sample from the following link.  

Search Panel demo : https://www.syncfusion.com/downloads/support/forum/152034/ze/SearchPanel_Demo-959790293  

You can also check all our DataGrid demo in a single project from the below given github link. 

GitHub link : https://github.com/syncfusion/wpf-demos/tree/master/datagrid  

Regards, 

Mohanram A.