AjaxControlToolkit Slider's TextChanged event not firing

Question

User-94285869 posted

Hi,

I need for the slider to execute a code behind when users slide it and stop.  Somehow, the code behind method is not firing.  Does anyone have a solution?  Below is my C# code:

protected void CroplandSlider_TextChanged(object sender, EventArgs e)
{
  //get value from dropdownlist
  string huccode = ddlHuccodes.Text;
  
  //call the method
  DisplayScenarioPieChart(huccode);
}

ASPX:

<ajaxToolkit:SliderExtender ID="CroplandSliderExtender" runat="server">
  BehaviorID = "CroplandSlider"
  Minimum=-100
  Maximum=100
  BoundControlID="CroplandSlider_BoundControl"
  RailCssClass="croplandrail"
  HandleCssClass="croplandhandle"
  HandleImageUrl="~/images/sliders/corn_handle.png"
  RaiseChangeOnlyOnMouseUp="true"
  EnableHandleAnimation="true">
</ajaxToolkit:SliderExtender>

<div>
  <asp:Label ID="CroplandSlider_BoundControl" runat="server" AssociatedControlID="CroplandSlider"/>
  <asp:TextBox ID="CroplandSlider" runat="server" AutoPostBack="True" Text="0" BorderStyle="None" ReadOnly="true" OnTextChanged="CroplandSlider_TextChanged"/>
</div>

I can't figure out why the method is not firing when user stop sliding.  Appreciate any help.

  
 

Answer 1

User-94285869 posted

Hi,

Found the error in my code.  I specified "ReadOnly=true"  property in my Slider's TextBox.  I removed this and then specified the property "RaiseChangeOnlyOnMouseUp=true" in my SliderExtender and it's working now.

Answer 2

User61956409 posted

Hi mgambone,

Thanks for your post.

Firstly, I’m glad to hear you resolve the problem by yourself. And thanks for sharing us your solution.

Secondly, you set TextBox.ReadOnly Property to true, it indicates the contents of the TextBox control cannot be changed. TextBox.TextChanged Event occurs when the content of the text box changes between posts to the server, so TextChanged Event does not fire if you set ReadOnly property to true.

Best Regards,

Fei Han