how do i retrieve viewstate values

Sreenish

11y2k.NET

Hi,

In my webform i have one calendar.

once i click on date one popup will popup with some fields.(button)

on button click data should be added on gridview .

and also that particular date events should get display on date click.

how do i do this.

any help appreciated...

thanks in advance.:)

45 Replies

Know the answer? Post it — somebody with the same question will find it here.

Raja T11y ago
Hi sreenish, Plz do ths atleast yourself. Then only you know what is the logic behind your code. what am saying is Get the count in data table for selected date and use for loop to display the date.
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Sreenish11y ago
Raja T,
Dont mind am little bit confused..
0
Sreenish11y ago
Raja T

How do i check that time???
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Raja T11y ago
I will explain wht logic is there you can do it.

If you selected some date from calender for example 7th.
Adding the event with time also (Name,Event,Time).
Event 1
Name: AAAA
Evnt: Event1
Time: 10:00AM

Next again click on same day.That time you can checke the if selected date is available or not in datatable.

If yes then create one dynamic table like

Events on Thuesday, July7, 2015
SNO      Name      Event
1         AAA     Event1
2        BBB       Event2
3            CCC      Event3

If no date in datatable then just display form only no need create dynamically table.
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Raja T11y ago
What is error you getting ?
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Sreenish11y ago
Okay
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Raja T11y ago
w8
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Sreenish11y ago
I have tried but am getting all events...
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Sreenish11y ago
Raja T,

In the table means including all events.??
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Sreenish11y ago
by adding time in the column am confused Raja T.tell me how to do that.
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Sreenish11y ago
how to do that ?? am trying but am not getting.
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Raja T11y ago
Just displaying in Table only.

Events on Thuesday, July7, 2015
Event 1
Name: AAAA
Evnt: Event1
Event 2
Name: AAAA
Evnt: Event2
Event 3
Name: AAAA
Evnt: Event3
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Sreenish11y ago
By adding time how we can display particular events of that date???
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Raja T11y ago
For that you can add time also on column in datatable. That time we will check on 7th how many events are there. Then you can get the details from datatable just display in list on all events in 7th.
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Sreenish11y ago
yeah Thankyou:)
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Sreenish11y ago
Raja T,

for example if am adding three events on 7th and two events on 23rd .then if i click on 7th i should able to see only three events of 7th.
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Raja T11y ago
Okay. Let me check and update you.
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Sreenish11y ago
Raja T

But am getting all events i want only particular date events
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Raja T11y ago
Okay,

Declare variable in globaly
string date;
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Sreenish11y ago
Raja T

am getting error in these lines

date = dt.Rows[i]["Date"].ToString();
if (date == TextBox3.Text)

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Sreenish11y ago
i have added still it is showing like

Error 2 The name 'date' does not exist in the current context C:\Users\centaur-04\Documents\Visual Studio 2010\Projects\Scheduler\Scheduler\ScedulerCal.aspx.cs 62 25 Scheduler
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Raja T11y ago
Hi

i am apologies, I added one in in postback method. Please check it

public void GetData(){
if (!IsPostBack)
{
dt = new DataTable();
dt.Columns.Add("Name");
dt.Columns.Add("Event");
dt.Columns.Add("Date");
ViewState["dt1"] = dt;
GridView1.DataSource = dt;
GridView1.DataBind();
}
}

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Sreenish11y ago
I want exactly like this...
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Sreenish11y ago
Rajeev
this is not what i want ...i have added some events on ex:07/06/15 for ex three events once if i click on 7th it should display only that three events.
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Rajeev Punhani11y ago
if you are not getting column 2 this means you didnt added dt.Columns.Add("Date"); in GetData Method.I have already checked code no error was coming.
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Sreenish11y ago
Raja T,
what is that date..it is showing error
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Sreenish11y ago
Rajeev,

cannot find column2..but how to inculde that column in source page
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Rajeev Punhani11y ago
Where exactly you are getting error please post that line.
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Sreenish11y ago
hi Rajeev

cannot cast type error is coming
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Sreenish11y ago
Hi Raja T
what is date over there am getting error like date not found
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Rajeev Punhani11y ago
i Added a column date in data table .Already i have given 3 methods in which i have made changes.
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Sreenish11y ago
find this attachment
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Sreenish11y ago
what is date over there am getting error like date not found
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Rajeev Punhani11y ago
I think you need to display the event already registered on that date in popup.So small Changes are needed.

protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
Btn1_Click(null, null);
dt = (DataTable)ViewState["dt1"];
if (dt.Rows.Count > 0)
{
foreach (DataRow dr in dt.Rows)
{
if (dr.Field("Date").Contains(Calendar1.SelectedDate.Date.ToString()))
{
TextBox1.Text = dr.Field("Name");
TextBox2.Text = dr.Field("Event");
}
else { }
}
}
TextBox3.Text = Calendar1.SelectedDate.Date.ToLongDateString();
}

public void GetData()
{
if (!IsPostBack)
{
dt = new DataTable();
dt.Columns.Add("Name");
dt.Columns.Add("Event");
dt.Columns.Add("Date");
ViewState["dt1"] = dt;
GridView1.DataSource = dt;
GridView1.DataBind();
}
}

protected void Button1_Click(object sender, EventArgs e)
{
dt = (DataTable)ViewState["dt1"];
DataRow dr1 = dt.NewRow();
dr1[0] = TextBox1.Text;
dr1[1] = TextBox2.Text;
dr1[2] = Calendar1.SelectedDate.Date.ToString();
TextBox1.Text = TextBox2.Text = string.Empty;
ViewState["dt1"] = dt;
dt.Rows.Add(dr1);
GridView1.DataSource = dt;
GridView1.DataBind();
Panel1.Visible = false;
//if (ViewState["dt1"] != null)
//{
// TextBox1.Text = ViewState["dt1"].ToString();
// TextBox2.Text = ViewState["dt1"].ToString();
//}
}
I added one more column date in your data table.Hope this is what you required.

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Raja T11y ago
Hi,

I understood about ur problem/code. Please add few line code in calender selectionchanged event.

protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
TextBox3.Text = Calendar1.SelectedDate.Date.ToLongDateString();
dt = (DataTable)ViewState["dt1"];
if (dt != null)
{
for (Int32 i = 0; i < dt.Rows.Count; i++)
{
date = dt.Rows[i]["Date"].ToString();
if (date == TextBox3.Text)
{
TextBox1.Text = dt.Rows[0]["Name"].ToString();
TextBox2.Text = dt.Rows[0]["Event"].ToString();
Button1.Visible = false;
Button2.Visible = false;
break;
}
else
{
TextBox1.Text = TextBox2.Text = string.Empty;
Button1.Visible = true;
Button2.Visible = true;
}
}
}
Btn1_Click(null, null);

}

I have tested your code working fine. In that i have added 3 events afer displaying in gridview. Next again click on event booked on the day just displaying what are given inputs.

Please find the attached screenshot for your refence.

Thanks

+1
Sreenish11y ago
Okay
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Lalit Raghav11y ago
w8
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Sreenish11y ago
hey friends no one knows answer to my question .help me
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Sreenish11y ago
did u got any idea
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Sreenish11y ago
Source Code::

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ScedulerCal.aspx.cs" Inherits="Scheduler.ScedulerCal" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<%--
--%>

BackColor="White" BorderColor="Black" DayNameFormat="Shortest" Font-Names="Times New Roman"
Font-Size="10pt" ForeColor="Black" NextPrevFormat="FullMonth" TitleFormat="Month">

Height="10pt" />

ForeColor="#333333" Width="1%" />

Height="14pt" />

Height="5%">

width: 30%" runat="server" Visible="false" BackColor="#CCCCFF">

OnClick="Button1_Click" />

CancelControlID="Button2">

Code Behind::

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
using System.Globalization;
using System.Data;
namespace Scheduler
{
public partial class ScedulerCal : System.Web.UI.Page
{
DataTable dt;
protected void Page_Load(object sender, EventArgs e)
{
GetData();
//if (!IsPostBack)
//{
// if (ViewState["dt1"] == Calendar1.SelectedDate.Date.ToLongDateString())
// {
// }
//}
}
public void GetData()
{
if (!IsPostBack)
{
dt = new DataTable();
dt.Columns.Add("Name");
dt.Columns.Add("Event");
ViewState["dt1"] = dt;
GridView1.DataSource = dt;
GridView1.DataBind();
}
}

protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
Btn1_Click(null, null);
TextBox3.Text = Calendar1.SelectedDate.Date.ToLongDateString();
}
protected void Btn1_Click(object sender, EventArgs e)
{
Panel1.Visible = true;
Mdl1.Show();
Mdl1.Focus();
}
protected void Button1_Click(object sender, EventArgs e)
{
dt = (DataTable)ViewState["dt1"];
DataRow dr1 = dt.NewRow();
dr1[0] = TextBox1.Text;
dr1[1] = TextBox2.Text;
TextBox1.Text = TextBox2.Text = string.Empty;
ViewState["dt1"] = dt;
dt.Rows.Add(dr1);
GridView1.DataSource = dt ;
GridView1.DataBind();
Panel1.Visible = false;
//if (ViewState["dt1"] != null)
//{
// TextBox1.Text = ViewState["dt1"].ToString();
// TextBox2.Text = ViewState["dt1"].ToString();
//}
}
}
}
output i have attached.there once i entered fields add button then in gridview will display.

now my problem is once if i click on date then whatever events i have added to that particular date it should only open.help me please...

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Upendra Pratap Shahi11y ago
What have you want to do actually? Please clarify .
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Sreenish11y ago
it is not helping me.
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Upendra Pratap Shahi11y ago
Hello,

go through below link-

http://www.c-sharpcorner.com/UploadFile/225740/what-is-view-state-and-how-it-works-in-Asp-Net53/

http://www.codeproject.com/Articles/31344/Beginner-s-Guide-To-View-State
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Sreenish11y ago
no dude this is not going to help me.on date click viewstate events should display.
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Nilesh Jadav11y ago
Try this:'

http://stackoverflow.com/questions/13642953/not-getting-value-in-viewstate-in-asp-net-using-c
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