dropdown selected index changed event fires while setting data from database in asp.net c#
I have dropdown inside update panel showing some list. When I select dropdown item, selected index changed event fires to populate other dropdown and data is saved and displayed in grid on submit. When I select grid row to edit, dropdown is set with database data. Now all things work fine. But when I select other control with postback, selected index changed event of that dropdown fires without selecting item and resets other dropdown with data to index 0. Why this event fires without selecting dropdown? Please help.
<asp:DropDownList ID="ddl" runat="server" AutoPostBack="True"
OnSelectedIndexChanged="ddl_SelectedIndexChanged">
</asp:DropDownList>
protected void ddl_SelectedIndexChanged(object sender, EventArgs e)
{
Fillddl();
}
public void Fillddl()
{
try
{
DataSet ds_ddl = _BLL.get_AllItems(ddl.SelectedValue);
if (ds_ddl != null)
{
if (ds_ddl .Tables[0].Rows.Count > 0)
{
ddl2.DataSource = ds_ddl.Tables[0].DefaultView;
ddl2.DataTextField = "NAME";
ddl2.DataValueField = "ID";
ddl2.DataBind();
}
}
ddl2.Items.Insert(0, new ListItem("Select", "0"));
ddl2.Dispose();
}
catch { }
}
c# asp.net
asked Nov 21 at 4:40
Krupesh03
195
add a comment |
I have dropdown inside update panel showing some list. When I select dropdown item, selected index changed event fires to populate other dropdown and data is saved and displayed in grid on submit. When I select grid row to edit, dropdown is set with database data. Now all things work fine. But when I select other control with postback, selected index changed event of that dropdown fires without selecting item and resets other dropdown with data to index 0. Why this event fires without selecting dropdown? Please help.
<asp:DropDownList ID="ddl" runat="server" AutoPostBack="True"
OnSelectedIndexChanged="ddl_SelectedIndexChanged">
</asp:DropDownList>
protected void ddl_SelectedIndexChanged(object sender, EventArgs e)
{
Fillddl();
}
public void Fillddl()
{
try
{
DataSet ds_ddl = _BLL.get_AllItems(ddl.SelectedValue);
if (ds_ddl != null)
{
if (ds_ddl .Tables[0].Rows.Count > 0)
{
ddl2.DataSource = ds_ddl.Tables[0].DefaultView;
ddl2.DataTextField = "NAME";
ddl2.DataValueField = "ID";
ddl2.DataBind();
}
}
ddl2.Items.Insert(0, new ListItem("Select", "0"));
ddl2.Dispose();
}
catch { }
}
c# asp.net
asked Nov 21 at 4:40
Krupesh03
195
Please add your code
– Just code
Nov 21 at 4:42
are you binding the first ddl in the page load? if yes , have you kept that binding code in Page.IsPostBack check??
– Gagan Deep
Nov 21 at 6:17
and what is ddl2.Dispose() doing in your code??
– Gagan Deep
Nov 21 at 6:18
dispose() releases the memory
– Krupesh03
Nov 21 at 7:32
add a comment |
I have dropdown inside update panel showing some list. When I select dropdown item, selected index changed event fires to populate other dropdown and data is saved and displayed in grid on submit. When I select grid row to edit, dropdown is set with database data. Now all things work fine. But when I select other control with postback, selected index changed event of that dropdown fires without selecting item and resets other dropdown with data to index 0. Why this event fires without selecting dropdown? Please help.
<asp:DropDownList ID="ddl" runat="server" AutoPostBack="True"
OnSelectedIndexChanged="ddl_SelectedIndexChanged">
</asp:DropDownList>
protected void ddl_SelectedIndexChanged(object sender, EventArgs e)
{
Fillddl();
}
public void Fillddl()
{
try
{
DataSet ds_ddl = _BLL.get_AllItems(ddl.SelectedValue);
if (ds_ddl != null)
{
if (ds_ddl .Tables[0].Rows.Count > 0)
{
ddl2.DataSource = ds_ddl.Tables[0].DefaultView;
ddl2.DataTextField = "NAME";
ddl2.DataValueField = "ID";
ddl2.DataBind();
}
}
ddl2.Items.Insert(0, new ListItem("Select", "0"));
ddl2.Dispose();
}
catch { }
}
c# asp.net
asked Nov 21 at 4:40
Krupesh03
195
I have dropdown inside update panel showing some list. When I select dropdown item, selected index changed event fires to populate other dropdown and data is saved and displayed in grid on submit. When I select grid row to edit, dropdown is set with database data. Now all things work fine. But when I select other control with postback, selected index changed event of that dropdown fires without selecting item and resets other dropdown with data to index 0. Why this event fires without selecting dropdown? Please help.
<asp:DropDownList ID="ddl" runat="server" AutoPostBack="True"
OnSelectedIndexChanged="ddl_SelectedIndexChanged">
</asp:DropDownList>
protected void ddl_SelectedIndexChanged(object sender, EventArgs e)
{
Fillddl();
}
public void Fillddl()
{
try
{
DataSet ds_ddl = _BLL.get_AllItems(ddl.SelectedValue);
if (ds_ddl != null)
{
if (ds_ddl .Tables[0].Rows.Count > 0)
{
ddl2.DataSource = ds_ddl.Tables[0].DefaultView;
ddl2.DataTextField = "NAME";
ddl2.DataValueField = "ID";
ddl2.DataBind();
}
}
ddl2.Items.Insert(0, new ListItem("Select", "0"));
ddl2.Dispose();
}
catch { }
}
c# asp.net
c# asp.net
asked Nov 21 at 4:40
Krupesh03
195
asked Nov 21 at 4:40
Krupesh03
195
edited Nov 21 at 5:02
asked Nov 21 at 4:40
Krupesh03
195
asked Nov 21 at 4:40
Krupesh03
195
asked Nov 21 at 4:40
Krupesh03
195
195
Please add your code
– Just code
Nov 21 at 4:42
are you binding the first ddl in the page load? if yes , have you kept that binding code in Page.IsPostBack check??
– Gagan Deep
Nov 21 at 6:17
and what is ddl2.Dispose() doing in your code??
– Gagan Deep
Nov 21 at 6:18
dispose() releases the memory
– Krupesh03
Nov 21 at 7:32
add a comment |
Please add your code
– Just code
Nov 21 at 4:42
are you binding the first ddl in the page load? if yes , have you kept that binding code in Page.IsPostBack check??
– Gagan Deep
Nov 21 at 6:17
and what is ddl2.Dispose() doing in your code??
– Gagan Deep
Nov 21 at 6:18
dispose() releases the memory
– Krupesh03
Nov 21 at 7:32
Please add your code
– Just code
Nov 21 at 4:42
Please add your code
– Just code
Nov 21 at 4:42
are you binding the first ddl in the page load? if yes , have you kept that binding code in Page.IsPostBack check??
– Gagan Deep
Nov 21 at 6:17
are you binding the first ddl in the page load? if yes , have you kept that binding code in Page.IsPostBack check??
– Gagan Deep
Nov 21 at 6:17
and what is ddl2.Dispose() doing in your code??
– Gagan Deep
Nov 21 at 6:18
and what is ddl2.Dispose() doing in your code??
– Gagan Deep
Nov 21 at 6:18
dispose() releases the memory
– Krupesh03
Nov 21 at 7:32
dispose() releases the memory
– Krupesh03
Nov 21 at 7:32
add a comment |
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Please add your code
– Just code
Nov 21 at 4:42
are you binding the first ddl in the page load? if yes , have you kept that binding code in Page.IsPostBack check??
– Gagan Deep
Nov 21 at 6:17
and what is ddl2.Dispose() doing in your code??
– Gagan Deep
Nov 21 at 6:18
dispose() releases the memory
– Krupesh03
Nov 21 at 7:32