Problem: textbox does not fire its TextChanged event after typing some text

asp.netdrop-down-menutextbox

I have a we form (.aspx) that has several controls such as dropdownlist, textbox(textbox1), …

The dropdownlist's autopostback is true and when I change the selected index of it, based on what index I have selected, a text is written in textbox1 and then because the autopostback of textbox1 is true, 2 other textboxes fill themselves based on the text written in textbox1.

But surprisingly, when I type some text directy in textbox1, the textchanged event of it doesn't fire.

why?

I use Asp.net 3.5, c#.

Best Answer

Do you type the text and tab out of the textbox? The postback for a textbox occurs when it loses focus. Refer remark section of TextBox.Autopostback.

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C# – Asp.net Dropdownlist selected index changed AND TextChanged Events not Fire? (C#)

Create the drop down list(the one that changes the content of the other one)

Activity: <asp:DropDownList ID="cmbActivity" runat="server" OnSelectedIndexChanged="cmbActivity_SelectedIndexChanged" AutoPostBack="true" />

Then in your C#, your load event should be like this

if (Session["staffId"] == null)
        {
            Response.Redirect("~/login.aspx");
        }
        else
        {
            if (!IsPostBack)
            {
             cmbActivity.DataSource = a;
             cmbActivity.DataTextField = "activityName";
             cmbActivity.DataValueField = "activiyId";
            }
        }

Your selectedIndex_Changed method still remains the same. This should work. Have more than one item in the list to be sure. I hope this helps

Best Answer

Related Solutions

C# – Asp.net Dropdownlist selected index changed AND TextChanged Events not Fire? (C#)

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