protected void lnk_Add_Click(object sender, DataListCommandEventArgs e)
{
Label id = (Label)e.Item.FindControl("lbl_PID");
Label lbl_P_Name = (Label)e.Item.FindControl("lbl_PN");
Image P_Image = (Image)e.Item.FindControl("Img");
LinkButton lnkbtn = (LinkButton)e.Item.FindControl("lnk_Add");
lnkbtn.Enabled = false;
}
I am using above method for Disabling a link button after it has been clicked once but the problem I am facing is that when ever I click on other link button(In other Row) the previous link button which was disable gets enable.
What I want is to disable a linkbutton until I don't enable it from any other event or method.
I suggest you to use ItemDataBound event of your Datalist
void Item_Bound(Object sender, DataListItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item ||
e.Item.ItemType == ListItemType.AlternatingItem)
{
var lnkbtn = (LinkButton)e.Item.FindControl("lnk_Add");
lnkbtn.Enabled = false;
}
}
Based on this link : http://msdn.microsoft.com/fr-fr/library/system.web.ui.webcontrols.datalist.itemdatabound.aspx
Just bind your grid in If(!IsPostBack) at your page_load event
Related
i am trying to create button and click event in rowdatabound in gridview c# asp.net like below code
protected void btnerror_Click(object sender, EventArgs e)
{
GridView gv = new GridView();
gv.RowDataBound += gv_RowDataBound;
gv.RowCommand += gv_RowCommand;
gv.RowCreated += gv_RowCreated;
gv.EnableViewState = true;
gv.DataSource = _dt;
gv.DataBind();
}
void gv_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
ImageButton btnUpdate = new ImageButton();
btnUpdate.ID = "btnupdate";
btnUpdate.ImageUrl = "~/SmartAdmin/Images/update.png";
btnUpdate.ToolTip = "Click Update";
btnUpdate.CommandName = "update";
btnUpdate.Click += btnUpdate_Click;
TableCell tc = new TableCell();
tc.Controls.Add(btnUpdate);
e.Row.Cells.Add(tc);
}
}
void gv_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "update")
{
}
}
while click that button click event is not firing ...
where i made error...
thank u.......
Do you really want to create the GridView manually? I strongly doubt that. Instead add it declaratively to the aspx-page and make it visible in btnerror_Click.
Don't create the control dynamically and register the event handler in RowDataBound but in RowCreated which is triggered on every postback (as opposed to RowDataBound):
void gv_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
ImageButton btnUpdate = new ImageButton();
btnUpdate.Click += btnUpdate_Click;
TableCell tc = new TableCell();
tc.Controls.Add(btnUpdate);
e.Row.Cells.Add(tc);
}
}
void gv_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
ImageButton btnUpdate = (ImageButton)e.Row.FindControls("btnupdate")
btnUpdate.ID = "btnupdate";
btnUpdate.ImageUrl = "~/SmartAdmin/Images/update.png";
btnUpdate.ToolTip = "Click Update";
btnUpdate.CommandName = "update";
}
}
So create it in RowCreated but initialize it in RowDataBound where you can also access the datasource (if required).
Also note that you should DataBind the GridView only if(!IsPostBack) not on every postback (if that's the case). So add this check where you assign the datasource.
You need to add function for click event
btnUpdate.Click += btnUpdate_Click;
protected void btnUpdate_Click(object sender, EventArgs e)
{
}
I have created a GridView as below:
protected void Page_Load(object sender, EventArgs e)
{
GridView gv = new GridView();
gv.ID = pId.ToString();
gv.AutoGenerateEditButton = true;
gv.DataKeyNames = ids;
gv.RowEditing += gv_RowEditing;
gv.RowUpdating += gv_RowUpdating;
bindGv(pId, gv);
}
I have also written the following methods:-
RowUpdating:
void gv_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridView gv = sender as GridView;
GridViewRow row = (GridViewRow)gv.Rows[e.RowIndex];
ProductCategory pc = context.ProductCategories.First(s => s.Name ==gv.ID );
TextBox txtName = row.FindControl("txtName") as TextBox;
pc.Name = txtName.Text;
}
RowEditing:
void gv_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView gv = sender as GridView;
gv.EditIndex = e.NewEditIndex;
bindGv(Convert.ToInt32(gv.ID), gv);
}
But when I ran the codes in debugging mode, clicking on the update button invokes gv_RowEditing method instead of gv_RowUpdating. What is the problem?
The Sequence of firing the events of gridview when you click on edit button to update any record it calls rowediting event and after that when you click on update button it calls rowupdating event.
rowediting event always invokes first then rowupdating.
I have a dynamically created button with an onclick event handler. The problem is that when I click the button it does not hit the event in the code-behind.
protected void gvOrder_RowDataBound(object sender, GridViewRowEventArgs e)
{
DataTable dt = ds.Tables[0];
DropDownList ddl = new DropDownList();
TextBox txt = new TextBox();
int index = 1;
if (e.Row.RowType == DataControlRowType.DataRow)
{
ddl = e.Row.FindControl("ddlNewO") as DropDownList;
txt = e.Row.FindControl("txtNewT") as TextBox;
}
foreach (DataRow r in dt.Rows)
{
string listitem = Convert.ToString(index);
ddl.Items.Add(listitem);
index++;
}
ddl.SelectedIndex = e.Row.RowIndex;
if (e.Row.RowIndex == 0)
{
ddl.Enabled = false;
txt.Enabled = false;
}
else if (e.Row.RowIndex != 0)
{
ddl.Items.Remove("1");
//Create ED button
if (e.Row.RowType == DataControlRowType.DataRow)
{
Button btnED = new Button();
btnED.ID = "btnED";
btnED.CssClass = "buttonsmall";
//btnED.CommandName = "ED";
btnED.EnableViewState = true;
btnED.Click += new EventHandler(btnED_Click);
foreach (DataRow r in dt.Rows)
{
btnED.Attributes.Add("ID", r.ItemArray[2].ToString());
if (r.ItemArray[3].ToString() == "1")
{
btnED.Text = "Disable";
}
else
{
btnED.Text = "Enable";
}
//Add button to grid
e.Row.Cells[5].Controls.Add(btnED);
}
}
}
}
protected void btnED_Click(object sender, EventArgs e)
{
// Coding to click event
}
So the problem here is that when the page is being recreated on post back - there is no more button! Dynamic controls need to be added on the page on every post back to fire events properly. In your case however on the first load when the GridView is binding you add the button to the page. But on the post back after the click the button is not added again, because GridView is not data bound again. Therefore ASP.NET cannot derive the source of the event, and supresses it.
Fix here is to bind GridView with data on every post back. Literally if you had if (!IsPostBack) - remove it. Or you can add the button in the template field and play with visibility - may be an approach as well.
You need to add a click handler on Row Created not on Data Bound I believe.
protected void gvOrderRowCreated(object sender, GridViewRowEventArgs e)
{
switch (e.Row.RowType) {
case DataControlRowType.DataRow:
Button btn = (Button)e.Row.FindControl("btnED");
btn.Command += btnED_Click;
break;
}
}
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.
I have a requirement to replace a label in gridview when I click on the Edit button added manually in grid view.
Please see below the code:
protected void btnchange_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
GridViewRow gvr = (GridViewRow)btn.NamingContainer;
int getindex = gvr.RowIndex;
gvorderdetail.Rows[getindex].Cells[3].Style.Value = "red";
gvorderdetail.Rows[getindex].Cells[0].Attributes["style"] = "background-color:Red";
gvorderdetail.Rows[getindex].Cells[1].Attributes["style"] = "background-color:Red";
gvorderdetail.Rows[getindex].Cells[2].Attributes["style"] = "background-color:Red";
TextBox tbx = (TextBox)gvorderdetail.Rows[getindex].FindControl("txtitemqty");
}
protected void gvorderdetail_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "change")
{
TextBox tbx = (TextBox)gvorderdetail.Rows[0].FindControl("txtitemqty");
}
}
Can anyone help?
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