how do i retrieve viewstate values

Question

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.:)

Raja T · Answer

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 { 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

Raja T · Answer

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.

Sreenish · Answer

Raja T, Dont mind am little bit confused..

Sreenish · Answer

Raja T How do i check that time???

Raja T · Answer

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.

Raja T · Answer

What is error you getting ?

Sreenish · Answer

Okay

Raja T · Answer

w8

Sreenish · Answer

I have tried but am getting all events...

Sreenish · Answer

Raja T, In the table means including all events.??

Sreenish · Answer

by adding time in the column am confused Raja T.tell me how to do that.

Sreenish · Answer

how to do that ?? am trying but am not getting.

Raja T · Answer

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

Sreenish · Answer

By adding time how we can display particular events of that date???

Raja T · Answer

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.

Sreenish · Answer

yeah Thankyou:)

Sreenish · Answer

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.

Raja T · Answer

Okay. Let me check and update you.

Sreenish · Answer

Raja T But am getting all events i want only particular date events

Raja T · Answer

Okay, Declare variable in globaly string date;

Sreenish · Answer

Raja T am getting error in these lines date = dt.Rows[i]["Date"].ToString(); if ( date == TextBox3.Text)

Sreenish · Answer

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

Raja T · Answer

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(); } }

Sreenish · Answer

I want exactly like this...

Sreenish · Answer

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.

Rajeev Punhani · Answer

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.

Sreenish · Answer

Raja T, what is that date..it is showing error

Sreenish · Answer

Rajeev, cannot find column2..but how to inculde that column in source page

Rajeev Punhani · Answer

Where exactly you are getting error please post that line.

Sreenish · Answer

hi Rajeev cannot cast type error is coming

Sreenish · Answer

Hi Raja T what is date over there am getting error like date not found

Rajeev Punhani · Answer

i Added a column date in data table .Already i have given 3 methods in which i have made changes.

Sreenish · Answer

find this attachment

Sreenish · Answer

what is date over there am getting error like date not found

Rajeev Punhani · Answer

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.

Sreenish · Answer

Okay

Lalit Raghav · Answer

w8

Sreenish · Answer

hey friends no one knows answer to my question .help me

Sreenish · Answer

did u got any idea

Sreenish · Answer

Source Code:: --%> 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...

Upendra Pratap Shahi · Answer

What have you want to do actually? Please clarify .

Sreenish · Answer

it is not helping me.

Upendra Pratap Shahi · Answer

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

Sreenish · Answer

no dude this is not going to help me.on date click viewstate events should display.

Nilesh Jadav · Answer

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

how do i retrieve viewstate values

Answers (45)