Set slider maximum programatically, c# RRS feed

  • Question

  • Hello,

    I'm new to c# (and wpf) and I have a very simple question.

    I am trying to set the maximum value of a slider in c# as opposed to doing so in XAML.  As a test I wrote a very simple function that will set an initial maximum value and then reset the value after some data is read in c# (new data is returned from a database query).

    The simple test function is triggered (only as a test) when data is returned. I have discovered that the function will successfully set the initial slider value but when triggered a second time (by the query return - causing the maximum value to change), the update causes the WPF application to crash.

    What am I doing wrong?

    // // //

    private Int32 temp_cache = 0;

    private void updateMySliderMax()
        Int32 some_slider_max = 40;
        Int32 a_reduced_test_value = 4;

        if (temp_cache != some_slider_max)
            My_Slider.Value = 20;
            My_Slider.Maximum = some_slider_max;
            temp_cache = some_slider_max;
            My_Slider.Value = 2;
            My_Slider.Maximum = a_reduced_test_value;

    Friday, July 3, 2020 11:36 PM

All replies

  • Theoretically, the else block should include ‘temp_cache = a_reduced_test_value’. It seems to work. Do you have more details about the issue?

    Saturday, July 4, 2020 5:46 AM
  • Hi tree28,

    Thanks for posting here.

    Since this issue is more related to WPF, we suggest to redirect to Microsoft Q&A forum with wpf tag, and then you will get deeicated support about it.

    Best Regards,


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    Monday, July 6, 2020 9:00 AM