WPF Combobox changing wrong fields in datatable

I'm working on a VB.net & WPF project, which contains a datatable with a combobox. When the cell with the combobox isn't being editted, the selected combobox value is being displayed in a textblock.

On my own PC (Windows 10), everything works fine. However, as soon as I transfer the program to the PC of my client (Windows 7), the comboboxes start to behave incorrectly. When I change the value of one of the comboboxes, other fields change as well. The weirdest thing is that sometimes all other fields in the same column change, and other times only a few. But in the end only the changed combobox field should change.

I recorded 2 small clips (see the URL below) in which you can see how it should work (the top one) vs. how it is working on Windows 7 (the bottom one).

https://imgur.com/gallery/F5MKnZv

This is the XAML code of the text/combobox:

<DataGridTemplateColumn Header="Reason for Write Off" >

    <DataGridTemplateColumn.CellTemplate>

        <DataTemplate>

            <TextBlock Text="{Binding Path=reason, UpdateSourceTrigger=PropertyChanged}"></TextBlock>

        </DataTemplate>

    </DataGridTemplateColumn.CellTemplate>

    <DataGridTemplateColumn.CellEditingTemplate>

        <DataTemplate>

            <ComboBox Name="ComboBox1" ItemsSource="{StaticResource ComboBoxReasonItems}" SelectedItem="{Binding Path=reason, UpdateSourceTrigger=PropertyChanged}" IsSynchronizedWithCurrentItem="True" ></ComboBox>

        </DataTemplate>

    </DataGridTemplateColumn.CellEditingTemplate>

</DataGridTemplateColumn>

asked Nov 20 '18 at 10:39

Rick Tibbe

What are you trying to achieve with the ItemSynchronization? You are using the same static ItemsSource for all "rows" and synchronize them. check this docs.microsoft.com/en-us/dotnet/api/… and try to remove it. The seemingly "random" behaviour is most likely because of the datagrid's Virtualization

– themightylc
Nov 20 '18 at 11:51

@themightylc this was indeed the problem. The weird thing though is that it only happend on Windows 7 and not on Windows 10. But thanks anyway :)

– Rick Tibbe
Nov 21 '18 at 11:40

Glad I could help. I have posted my advice as an answer, if you have the time, you may accept it :)

– themightylc
Nov 22 '18 at 6:38

add a comment |

I'm working on a VB.net & WPF project, which contains a datatable with a combobox. When the cell with the combobox isn't being editted, the selected combobox value is being displayed in a textblock.

I recorded 2 small clips (see the URL below) in which you can see how it should work (the top one) vs. how it is working on Windows 7 (the bottom one).

https://imgur.com/gallery/F5MKnZv

This is the XAML code of the text/combobox:

<DataGridTemplateColumn Header="Reason for Write Off" >

    <DataGridTemplateColumn.CellTemplate>

        <DataTemplate>

            <TextBlock Text="{Binding Path=reason, UpdateSourceTrigger=PropertyChanged}"></TextBlock>

        </DataTemplate>

    </DataGridTemplateColumn.CellTemplate>

    <DataGridTemplateColumn.CellEditingTemplate>

        <DataTemplate>

            <ComboBox Name="ComboBox1" ItemsSource="{StaticResource ComboBoxReasonItems}" SelectedItem="{Binding Path=reason, UpdateSourceTrigger=PropertyChanged}" IsSynchronizedWithCurrentItem="True" ></ComboBox>

        </DataTemplate>

    </DataGridTemplateColumn.CellEditingTemplate>

</DataGridTemplateColumn>

asked Nov 20 '18 at 10:39

Rick Tibbe

What are you trying to achieve with the ItemSynchronization? You are using the same static ItemsSource for all "rows" and synchronize them. check this docs.microsoft.com/en-us/dotnet/api/… and try to remove it. The seemingly "random" behaviour is most likely because of the datagrid's Virtualization

– themightylc
Nov 20 '18 at 11:51

@themightylc this was indeed the problem. The weird thing though is that it only happend on Windows 7 and not on Windows 10. But thanks anyway :)

– Rick Tibbe
Nov 21 '18 at 11:40

Glad I could help. I have posted my advice as an answer, if you have the time, you may accept it :)

– themightylc
Nov 22 '18 at 6:38

add a comment |

I'm working on a VB.net & WPF project, which contains a datatable with a combobox. When the cell with the combobox isn't being editted, the selected combobox value is being displayed in a textblock.

I recorded 2 small clips (see the URL below) in which you can see how it should work (the top one) vs. how it is working on Windows 7 (the bottom one).

https://imgur.com/gallery/F5MKnZv

This is the XAML code of the text/combobox:

<DataGridTemplateColumn Header="Reason for Write Off" >

    <DataGridTemplateColumn.CellTemplate>

        <DataTemplate>

            <TextBlock Text="{Binding Path=reason, UpdateSourceTrigger=PropertyChanged}"></TextBlock>

        </DataTemplate>

    </DataGridTemplateColumn.CellTemplate>

    <DataGridTemplateColumn.CellEditingTemplate>

        <DataTemplate>

            <ComboBox Name="ComboBox1" ItemsSource="{StaticResource ComboBoxReasonItems}" SelectedItem="{Binding Path=reason, UpdateSourceTrigger=PropertyChanged}" IsSynchronizedWithCurrentItem="True" ></ComboBox>

        </DataTemplate>

    </DataGridTemplateColumn.CellEditingTemplate>

</DataGridTemplateColumn>

asked Nov 20 '18 at 10:39

Rick Tibbe

I'm working on a VB.net & WPF project, which contains a datatable with a combobox. When the cell with the combobox isn't being editted, the selected combobox value is being displayed in a textblock.

I recorded 2 small clips (see the URL below) in which you can see how it should work (the top one) vs. how it is working on Windows 7 (the bottom one).

https://imgur.com/gallery/F5MKnZv

This is the XAML code of the text/combobox:

<DataGridTemplateColumn Header="Reason for Write Off" >

    <DataGridTemplateColumn.CellTemplate>

        <DataTemplate>

            <TextBlock Text="{Binding Path=reason, UpdateSourceTrigger=PropertyChanged}"></TextBlock>

        </DataTemplate>

    </DataGridTemplateColumn.CellTemplate>

    <DataGridTemplateColumn.CellEditingTemplate>

        <DataTemplate>

            <ComboBox Name="ComboBox1" ItemsSource="{StaticResource ComboBoxReasonItems}" SelectedItem="{Binding Path=reason, UpdateSourceTrigger=PropertyChanged}" IsSynchronizedWithCurrentItem="True" ></ComboBox>

        </DataTemplate>

    </DataGridTemplateColumn.CellEditingTemplate>

</DataGridTemplateColumn>

wpf vb.net combobox

asked Nov 20 '18 at 10:39

Rick Tibbe

asked Nov 20 '18 at 10:39

Rick Tibbe

asked Nov 20 '18 at 10:39

Rick Tibbe

asked Nov 20 '18 at 10:39

Rick Tibbe

asked Nov 20 '18 at 10:39

Rick Tibbe

What are you trying to achieve with the ItemSynchronization? You are using the same static ItemsSource for all "rows" and synchronize them. check this docs.microsoft.com/en-us/dotnet/api/… and try to remove it. The seemingly "random" behaviour is most likely because of the datagrid's Virtualization

– themightylc
Nov 20 '18 at 11:51

@themightylc this was indeed the problem. The weird thing though is that it only happend on Windows 7 and not on Windows 10. But thanks anyway :)

– Rick Tibbe
Nov 21 '18 at 11:40

Glad I could help. I have posted my advice as an answer, if you have the time, you may accept it :)

– themightylc
Nov 22 '18 at 6:38

add a comment |

What are you trying to achieve with the ItemSynchronization? You are using the same static ItemsSource for all "rows" and synchronize them. check this docs.microsoft.com/en-us/dotnet/api/… and try to remove it. The seemingly "random" behaviour is most likely because of the datagrid's Virtualization

– themightylc
Nov 20 '18 at 11:51

@themightylc this was indeed the problem. The weird thing though is that it only happend on Windows 7 and not on Windows 10. But thanks anyway :)

– Rick Tibbe
Nov 21 '18 at 11:40

Glad I could help. I have posted my advice as an answer, if you have the time, you may accept it :)

– themightylc
Nov 22 '18 at 6:38

What are you trying to achieve with the ItemSynchronization? You are using the same static ItemsSource for all "rows" and synchronize them. check this docs.microsoft.com/en-us/dotnet/api/… and try to remove it. The seemingly "random" behaviour is most likely because of the datagrid's Virtualization

– themightylc
Nov 20 '18 at 11:51

@themightylc this was indeed the problem. The weird thing though is that it only happend on Windows 7 and not on Windows 10. But thanks anyway :)

– Rick Tibbe
Nov 21 '18 at 11:40

Glad I could help. I have posted my advice as an answer, if you have the time, you may accept it :)

– themightylc
Nov 22 '18 at 6:38

add a comment |

1 Answer
1

active

oldest

votes

If the Property IsSynchronizedWithCurrentItem is set to true, it synchronizes the selected Item in the ComboBox with the ItemsSource. As all "rows" bind to the same static List, and they all sync up, this behaviour is expected.

See Microsoft Docs

answered Nov 22 '18 at 6:37

themightylc

179113

add a comment |

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1 Answer
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See Microsoft Docs

answered Nov 22 '18 at 6:37

themightylc

179113

add a comment |

See Microsoft Docs

answered Nov 22 '18 at 6:37

themightylc

179113

add a comment |

See Microsoft Docs

answered Nov 22 '18 at 6:37

themightylc

179113

See Microsoft Docs

answered Nov 22 '18 at 6:37

themightylc

179113

answered Nov 22 '18 at 6:37

themightylc

179113

answered Nov 22 '18 at 6:37

themightylc

179113

answered Nov 22 '18 at 6:37

themightylc

179113

add a comment |

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