1

Cannot get wpf project to reconise FolderBrowserDialog

using System.Windows.Forms.Integration;
using System.Windows.Forms; 

 private void Button_Click_1(object sender, RoutedEventArgs e)
    {

        FolderBrowserDialog browse = new FolderBrowserDialog();
    }

type or name space FolderBrowserDialog could not be found???

H.B.
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Jed I
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  • try this link: [folderbrowserdialog-in-wpf-c-sharp][1] [1]: http://stackoverflow.com/questions/6630847/folderbrowserdialog-in-wpf-c-sharp – KF2 Aug 24 '12 at 16:55

3 Answers3

5

If your project is a WPF .Net Core 3.1 then you have to add the following tag to the project file :-

<UseWindowsForms>true</UseWindowsForms>

My project file looks like this with this line in:

<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <UseWPF>true</UseWPF>
    <UseWindowsForms>true</UseWindowsForms>   <<<<-----
  </PropertyGroup>
</Project>

After adding this line, save and clean the existing solution build and then rebuild it. This sorted the issue for me...oh don't forget to also add the "using" to your code file where you using the folder selection method:

using System.Windows.Forms;
Abaid Mughal
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3

You will need to add reference to the assembly System.Windows.Forms before you can use the dialog in wpf. (Right click on project and select add reference)

sam1589914
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  • Strange, that does the job for me. Have you tried using the Object Browser to go into the System.Windows.Forms assembly then namespace and check if the FolderBrowserDialog is listed there ? – sam1589914 Aug 24 '12 at 16:16
0

A console application does not automatically add a reference to System.Windows.Forms.dll.

Right-click your project in Solution Explorer and select Add reference... and then find System.Windows.Forms and add it.

Jcrash29
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