protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
grid();
}
}
protected void btnsearch_Click(object sender, EventArgs e)
{
objRetailPL.ZoneName = ddlzone.SelectedValue;
//IFormatProvider provider = new System.Globalization.CultureInfo("en-CA", true);
//String datetime = txtdate.Text.ToString();
//DateTime dt = DateTime.Parse(datetime, provider, System.Globalization.DateTimeStyles.NoCurrentDateDefault);
//objRetailPL.date =dt;
DataTable dtsearch = new DataTable();
dtsearch = objRetailBAL.searchzone(objRetailPL);
GVRate.DataSource = dtsearch;
GVRate.DataBind();
}
protected void GVRate_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
try
{
GVRate.PageIndex = e.NewPageIndex;
grid();
}
catch (Exception ex)
{
}
}
I have this code for searching records.And for that grid i added page index,but it is not coming properly.When click on search button it is showing more n of records at that time page index is not working. It is calling First grid before clicking search button..How can I change my code please help me.....
Try this ...
private void grid()
{
if(!string.IsNullOrEmpty(yourSearchTextBox.Text)
{
// Then call search method. Make sure you bind the Grid in that method.
}
else
{
// Normally Bind the Grid as you are already doing in this method.
}
}
you have to check whether there is any search Text or not in that grid() method like...
Related
I have my website running on dotnetnuke 7.4, i have a checklistbox which i bind on the page load, and after selecting items from it, user clicks on the submit button, the selected items should save in database, however when i click on the submit button, checklistbox gets blank, i tried to enable ViewState at :
Web.config level
Page Level
Control Level
But all in vain, it still unbinds checklistbox because of which everything disappears, i tried the same in plain .net and it works like a charm.
Is there any specific settings in dotnetnuke to support viewstate, or is there any other better option to achieve this.
Here's my code:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Entities objEntities = new Entities();
List<Entities> obj = objEntities.GetList(2);
chkBox.DataSource = obj;
chkBox.DataTextField = "Name";
chkBox.DataValueField = "ID";
chkBox.DataBind();
}
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
foreach (ListItem item in chkBox.Items)
Response.Write(item.Text + "<br />");
}
There's the issue. Remove that (!IsPostBack) check in your page_load event. Have your code to be like below. Else, only at first page load you are binding the datasource to control which gets lost in postback.
protected void Page_Load(object sender, EventArgs e)
{
Entities objEntities = new Entities();
List<Entities> obj = objEntities.GetList(2);
chkBox.DataSource = obj;
chkBox.DataTextField = "Name";
chkBox.DataValueField = "ID";
chkBox.DataBind();
}
OR, to be more efficient; refactor your code to a method like below and store the data object in Session variable like
private void GetDataSource()
{
List<Entities> obj = null;
if(Session["data"] != null)
{
obj = Session["data"] as List<Entities>;
}
else
{
Entities objEntities = new Entities();
obj = objEntities.GetList(2);
}
chkBox.DataSource = obj;
chkBox.DataTextField = "Name";
chkBox.DataValueField = "ID";
chkBox.DataBind();
Session["data"] = obj;
}
Call the method in your Page_Load event like
protected void Page_Load(object sender, EventArgs e)
{
GetDataSource();
}
Having to use pre render is causing me problems.. It would be great if I did not need it.. The problem is I have the list in a user control and when I goto the next 'page' I databind.. but then the datapager prerenders.. which also does a batabind.. so it runs twice..
If I remove the prerender .. then clicking next 'page' does nothing..
Any idea?
protected void Page_Load(object sender, EventArgs e)
{
GetSearchResults();
}
//protected void dpMembers_PreRender(object sender, EventArgs e)
//{
// GetSearchResults();
//}
public void GetSearchResults()
{
List<Person> listPerson = new List<Person>();
string strServer = "localhost";
string strAppPath = Server.MapPath("/");
PersonBusiness pb = new PersonBusiness(new PersonRepository());
listPerson = pb.GetAllPersons(strServer, strAppPath);
lvPersons.DataSource = listPerson;
lvPersons.DataBind();
}
Modify your Page load to
protected void Page_Load(object sender, EventArgs e)
{
if(!Page.IsPostBack)
{
GetSearchResults();
}
}
your prerender seems ok.
I have the following .aspx page. I'm searching for the words that are in the database, everything works fine. I also have a HyperLink which shows a message if the word does not exist in the database.
BUT the only problem is when I search for the word and the word is not in the database it doesn't show the HyperLink from the first time, I have to CLICK ENTER twice for it to work, and CLICK CLEAR twice for it to dissapear.
I know that the problem is that I have the button after the page_load, but I can't find the solution for it. What I've tried is created another function private void load_data() and copy everything from page_load into it. And in the load_page and button2_click just call load_data(); It doesn't work.
Here's the code:
namespace TRI_Portal.ScreenPop.Gloss
{
public partial class Gloss_Test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (GridView2.Rows.Count == 0)
{
HyperLink1.Visible = true;
}
else
{
HyperLink1.Visible = false;
}
String s = Request.QueryString["language"];
Language1.Text = Server.HtmlEncode(s);
}
}
}
I have tried this as well, but no luck.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
SetLink();
}
}
private void SetLink()
{
if (GridView2.Rows.Count == 0)
{
HyperLink1.Visible = true;
}
else
{
HyperLink1.Visible = false;
}
String s = Request.QueryString["language"];
Language1.Text = Server.HtmlEncode(s);
}
protected void Button2_Click(object sender, EventArgs e)
{
SetLink();
}
Any suggestions?
Handle GridView.DataBound event
protected void GridView1_DataBound(object sender, EventArgs e)
{
SetLink();
}
And markup:
<asp:GridView OnDataBound="GridView1_DataBound" ....
Remove the code from the Page_Load event.
I want to preserve the dynamically created control when postback occurs .
protected void Page_Load(object sender, EventArgs e)
{
}
private void CreateTable()
{
HtmlTableRow objHtmlTblRow = new HtmlTableRow();
HtmlTableCell objHtmlTableCell = new HtmlTableCell();
objHtmlTableCell.Controls.Add(new TextBox());
objHtmlTblRow.Cells.Add(objHtmlTableCell);
mytable.Rows.Add(objHtmlTblRow);
this.SaveControlState();
// this.Controls.Add(mytable);
}
protected void Button1_Click(object sender, EventArgs e)
{
CreateTable();
}
It can be achieved by calling CreateTable() in Page_Load. Is there any alternative way to preserve the control
Thanks
You can add them to a List when you create them and save your List to Session. On postback (Page_Load) load them from your Session to your Page.
the below code should work
protected void Page_PreInit(object sender, EventArgs e)
{
Control myControl = GetPostBackControl(this.Page);
}
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
CreateTable()
}
public static Control GetPostBackControl(Page thisPage)
{
Control ctrlPostedback = null;
string ctrlName = thisPage.Request.Params.Get("__EVENTTARGET");
if (!String.IsNullOrEmpty(ctrlName))
{
ctrlPostedback = thisPage.FindControl(ctrlName);
}
else
{
foreach (string Item in thisPage.Request.Form)
{
Control c = thisPage.FindControl(Item);
if (((c) is System.Web.UI.WebControls.Button))
{
ctrlPostedback = c;
}
}
}
return ctrlPostedback;
}
The code works from UpdatePanel
Reference:http://www.asp.net/ajax/videos/how-to-dynamically-add-controls-to-a-web-page
i careate button control and place in panel but not working?
protected void Button1_Click(object sender, EventArgs e)
{
Button btn = new Button();
btn.Text = "Test button";
Panel1.Controls.Add(btn);
btn.Click += new EventHandler(btn_Click);
}
void btn_Click(object sender, EventArgs e)
{
Response.Write("<script>alert('test')</script>");
}
When you dynamically add controls to your page, you have to re-add them on any subsequent request (postback). The button you added in Button1_OnClick will not automatically be recreated in a subsequent request (e.g. in a postback).
There a lot's of similar questions about this topic, where you can find details. For examples, use the following search:
https://stackoverflow.com/search?q=dynamic+control+event+[asp.net]
Make sure you assign an ID to the button, and make sure it's the same everytime you create it.
Create the control in the CreateChildControls overload, adding it once in response to another event isn't going to be enough to keep it on the page.
You're best bet is going to be tracking the whether the button needs to be created or not:
bool CreateButton
{
get
{
if (ViewState["CreateButton"] == null)
return false;
return (bool)ViewState["CreateButton"];
}
set
{
ViewState["CreateButton"] = value;
}
}
override void public CreateChildControls ()
{
panel1.Controls.Clear ();
if (CreateButton)
{
Button btn = new Button();
btn.Text = "Test button";
btn.ID = "CreatedButton"; // Note the ID here...
Panel1.Controls.Add(btn);
btn.Click += new EventHandler(btn_Click);
}
}
protected void Button1_Click(object sender, EventArgs e)
{
CreateButton = true;
EnsureChildControls ();
}
void btn_Click(object sender, EventArgs e)
{
Response.Write("<script>alert('test')</script>");
}
Something like that should work for you...