Develop Reference

How to prevent auto firing RadioButtonList indexchange event?

I have a radioButton list and I want to set 0 as default index.
But,when page is posted by other button ,radiobuttonListChanged event is firing automaticly.
What should I do ?
protected void Page_Load (object sender, EventArgs e)
{
rblList.DataSource = MyDataSource();
rblList.DataBind ();
if (!IsPostBack)
{
rblAccounts.SelectedIndex = 0;
}
}
protected void rbl_Changed (object sender, EventArgs e)
{
Response.Write("Change Event fired");
}

In rbl_Changed event Write following code probably will help you out.
rbl.changed-= rbl_Changed;
rbl.changed = false;
rbl.changed+= rbl_Changed;

Hide row in Gridview asp.net

I am trying to hide a row when its button clicked in my gridview. Does anyone have a solution for this, I am all yours,
Code behind:
protected void gvShow_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "removethis")
{
Guid id = Guid.Parse(e.CommandArgument.ToString());
UsersBL.DeleteUserByUserId(id);
}
else
{
//hide the row
}
}

try this - Add RowDataBound event and do like this:
e.Row.Visible = false;

You need to access the row-object and then you can hide it, it's a little tricky:
protected void gvShow_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "removethis")
{
GridViewRow row = (GridViewRow)(((Button)e.CommandSource).NamingContainer);
row.Visible = false;
}
}

How to get value from radiobutton to linkbox

I'm trying to get the value of radio button selection to my listbox, but the listbox always gets the same value even though selection was different. Please help, I am a newbie to coding, I couldn't find any answers on the net either..
Here are the codes I've written:
void rdbtnOne_CheckedChanged(object sender, EventArgs e)
{
if (rdbtnOne.Checked == true)
{
rdbtnOne.Text = "Men";
}
else
{
rdbtnOne.Text = "Women";
}
}
void btnOne_Click(object sender, EventArgs e)
{
lstOne.Items.Add(i + rdbtnOne.Text);
i++;
}

Ok, I have found the solution, FINALLY. The reason that my code did not work in the first place was because I tried to give value by equaling rdbtnOne.Text directly. Instead I created another value to equal it. All right here is how it worked for me:
string MenOrWomen;
void rdbtnTwo_CheckedChanged(object sender, EventArgs e)
{
if (rdbtnTwo.Checked.Equals(true))
{
MenOrWomen = "Women";
}
else
{
MenOrWomen = "Men";
}
}
void rdbtnOne_CheckedChanged(object sender, EventArgs e)
{
if (rdbtnOne.Checked.Equals(true))
{
MenOrWomen = "Men";
}
else
{
MenOrWomen = "Women";
}
}
int i = 1;
void btnOne_Click(object sender, EventArgs e)
{
lstOne.Items.Add(i + MenOrWomen);
i++;
}

Devexpress DataGrid contextmenu disappear

I have a strange problem with DataGrid context menu. I load item details from server after click on a item in datagrid. While loading the details the application shows a waitscreen:
private void gridViewOrders_MouseDown (object sender, MouseEventArgs e)
{
GridView gv = sender as GridView;
if (gv != null)
{
ShowWaitScreen (message);
GridHitInfo ghi = gv.CalcHitInfo (e.Location);
...
CloseWaitScreen ( );
}
}
When the user click the right mouse button, it should shows a context menu:
private void gridViewOrders_PopupMenuShowing (object sender, PopupMenuShowingEventArgs e)
{
if (e.MenuType == GridMenuType.Row)
{
DXMenuItem item = new DXMenuItem ("Delete", OnBtnDeleteOrder_Click);
e.Menu.Items.Add (item);
}
}
But the menu disappear at once. When I remove the waitscreen, the context menu is shown and the user can select the "Delete" menuitem. Any hints, how I can fix this problem? Thank you!

A good solution for my problem is to do the following:
private void gridViewOrders_MouseDown (object sender, MouseEventArgs e)
{
GridView gv = sender as GridView;
if (gv != null)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
ShowWaitScreen (message);
...
CloseWaitScreen ( )
}
}
}
Thanks to the DevExpress team for the hint!

I dont really thisnk you need to handle anything in MouseDown event.
This code works for GridView:
private void gridView1_PopupMenuShowing(object sender, PopupMenuShowingEventArgs e)
{
GridView view = sender as GridView;
if (e.MenuType == DevExpress.XtraGrid.Views.Grid.GridMenuType.Row)
{
int rowHandle = e.HitInfo.RowHandle;
e.Menu.Items.Clear();
DXMenuItem zaznaczItem = new DXMenuItem("Zaznacz wszystkie", new EventHandler(zaznacz_Click));
DXMenuItem odznaczItem = new DXMenuItem("Odznacz wszystkie", new EventHandler(odznacz_Click));
e.Menu.Items.Add(zaznaczItem);
e.Menu.Items.Add(odznaczItem);
}
}
void zaznacz_Click(object sender, EventArgs e)
{
foreach (DataRow dr in (gcKontrahent.DataSource as DataTable).Rows)
{
dr["checkbox"] = true;
}
}
Handler zaznacz_Click is just example of handler for selected menu item. odznacz_Click is similar so I didnt post it. I dont have example for DataGrid so excuise me if it's not good solution. Just take it as example for acomplishing context menu handling in GridView.

Clear listbox when new tab selected

I am trying to clear the contents of a listbox when a new tab is seleced. Here is what I got, but nothing happens.
private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
{
if (tabControl1.SelectedTab == tabControl1.TabPages["entryTab"])
{
readBox.Items.Clear();
reminderBox.Items.Clear();
}
}

Try something like this in your form load
tabControl1.Selecting += new TabControlCancelEventHandler(tabControl1_SelectedIndexChanged);

// Try this set null to DataSource
private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
{
if (tabControl1.SelectedTab == tabControl1.TabPages["entryTab"])
{
readBox.DataSource = null;
reminderBox.DataSource = null;
}
}