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Subject:
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DropDownList not firing
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Posted By:
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pbyrum
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Post Date:
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10/7/2004 7:55:57 PM
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I am using ASP C# on a web page and have an ASP dropdown list control. When select and change a different value in the dropdown list, my event is not firing.
I have used:
OnSelectedIndexChanged="ddlRoom_SelectedIndexChanged"
in the ASPX page and this work, however I get a memory exception error when I close IE.
I have also tried:
this.ddlRoom.SelectedIndexChanged += new System.EventHandler(ddlRoom_SelectedIndexChanged);
private void ddlRoom_SelectedIndexChanged(object sender, System.EventArgs e)
but this is not firing. What is the proper way of programming an event for a dropdown list?
Thanks,
Paul
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Reply By:
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mahulda
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Reply Date:
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10/8/2004 1:46:02 AM
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1. In the tag of the dropdownlist put Autopostback = "true" OnSelectedIndexChanged = "ddlRoom_SelectedIndexChanged"
2. Make sure you have the event handler subroutine (ddlRoom_SelectedIndexChanged) declared in your code
-.. -..
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Reply By:
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xiaozhou
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Reply Date:
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10/8/2004 3:10:29 AM
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I am a new learner ,i don't know how to study ,can you help me ?
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Reply By:
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stu9820
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Reply Date:
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10/8/2004 7:13:32 AM
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What do you need help with?
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Reply By:
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pbyrum
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Reply Date:
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10/8/2004 2:42:47 PM
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I have the following in the .cs file:
this.ddlRoom.SelectedIndexChanged += new System.EventHandler(ddlRoom_SelectedIndexChanged);
private void ddlRoom_SelectedIndexChanged(object sender, System.EventArgs e)
{
}
In my .ASPX file, in have:
<asp:dropdownlist id="ddlRoom" runat="server" AutoPostBack="True">
Note that I do not have the OnSelectedIndexChanged in the tag, and the method is private. This works. I am not sure why but it works.
Howevwer, I get and MS IE application error when I close IE and end the debug session in MS Visual Studio. This error only occurs when I select the dropdown list box and the event is fired.
iexplorer.exe - Application Error. The instruction at "0x10003e8d" referenced memory at "0x10003e8d". The memory could not be "read"
What could be going on?
Thanks,
Paul
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Reply By:
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bmains
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Reply Date:
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10/8/2004 5:31:11 PM
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You don't need the event in the tag. That looks right to me... The memory reference error may have nothing to do with your app; it may be an error with the browser. I get those sometimes.
Brian
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Reply By:
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pbyrum
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Reply Date:
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10/11/2004 11:39:45 AM
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Thanks for your help. It appears there is something going on behind the seens with MS IE, but I think the code is working to some agree.
Paul
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Reply By:
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bmains
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Reply Date:
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10/12/2004 11:58:37 AM
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Happens every now and then. It helps to have the most current browser also, even though that shouldn't be an issue.
Brian
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