asked on can't get asp.net ListBox SelectedValue
No matter what I try, I can't get the SelectedValue from my listbox on postback. I have triple-checked and even verified by stepping through code that I'm not rebinding my listbox to the datasource on postback (button click).
listbox declaration:
<asp:ListBox ID="listAvailableAMCs" Rows="8" Width="300px" DataValueField="ID" DataTextField="Company" runat="server"></asp:ListB
Listbox data population works fine.
A button click calls this:
protected void LinkAMC(object sender, EventArgs e)
{
if(listAvailableAMCs.Selec
Utilities.LinkAMC(int.Pars
LoadGridData();
}
SelectedValue is always blank. SelectedText is blank and SelectedIndex is -1.
A view source reveals this html:
<select size="8" name="ctl00$MasterMain$lis
<option value="19">Como AMC</option>
<option value="21">Sinatra AMC</option>
<option value="20">Martin AMC</option>
</select>
Those option values and text values are exactly right.
What am I missing?
listbox declaration:
<asp:ListBox ID="listAvailableAMCs" Rows="8" Width="300px" DataValueField="ID" DataTextField="Company" runat="server"></asp:ListB
Listbox data population works fine.
A button click calls this:
protected void LinkAMC(object sender, EventArgs e)
{
if(listAvailableAMCs.Selec
Utilities.LinkAMC(int.Pars
LoadGridData();
}
SelectedValue is always blank. SelectedText is blank and SelectedIndex is -1.
A view source reveals this html:
<select size="8" name="ctl00$MasterMain$lis
<option value="19">Como AMC</option>
<option value="21">Sinatra AMC</option>
<option value="20">Martin AMC</option>
</select>
Those option values and text values are exactly right.
What am I missing?
ASP.NET
Last Comment
SweatCoder
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Else please post the complete Code behind Code so that I can help you out much better
ASKER
I am only binding data source when not in a postback:
if (!IsPostBack)
{
listAvailableAMCs.DataSour
listAvailableAMCs.DataBind
}
I have noticed that everything works fine when I use a declarative data source in the aspx, but this becomes awkward. I'd rather get my data from a class library where I can do some logic checks, pass in variables, parameterize the query, etc.
if (!IsPostBack)
{
listAvailableAMCs.DataSour
listAvailableAMCs.DataBind
}
I have noticed that everything works fine when I use a declarative data source in the aspx, but this becomes awkward. I'd rather get my data from a class library where I can do some logic checks, pass in variables, parameterize the query, etc.
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ASKER
Had to use javascript, asp.net solution never worked. Awarding points just so I can close this.
2 - viewstate is disabled for the whole site because I don't need. Maybe you've got a point here, but I use asp:DropDownList on other pages and it works fine with viewstate turned off. Why would ListBox be different from ddl in that respect?
3- Not sure exactly what you mean. If i'm not in a postback, that's when I bind the listbox.