How do I send selected checkbox value while selecting the multiple data on different pages of gridview on button click event in ASP.NET C#

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protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
lblMsg.Text = "";
FillGrid();
FillGridViewDropdown();

}
}

protected void gvTrainStatus_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
SaveCheckedValues();
gvTrainStatus.PageIndex = e.NewPageIndex;
this.FillGrid();
PopulateCheckedValues();
}

protected void btnSendDataToDisplay_Click(object sender, EventArgs e)
{

string str = string.Empty;
string strname = string.Empty;
foreach (GridViewRow gvrow in gvTrainStatus.Rows)
{
PopulateCheckedValues();
SaveCheckedValues();

//if (Session["CHECKED_ITEMS"] != null)

{
CheckBox chk = (CheckBox)gvrow.FindControl("ChkSelect");
if (chk != null & chk.Checked)
{

str += (gvrow.Cells[1].FindControl("lblTrainNo") as Label).Text;// gvrow.Cells[1].Text + ", ";
str += (gvrow.Cells[2].FindControl("lblTrainName") as Label).Text;// gvrow.Cells[2].Text + ", ";
str += (gvrow.Cells[3].FindControl("lblScheduleArrival") as Label).Text;// "Company :- " + gvrow.Cells[3].Text + ", ";
str += (gvrow.Cells[4].FindControl("lblScheduleDeparture") as Label).Text;// "Addess :- " + gvrow.Cells[4].Text;
str += (gvrow.Cells[5].FindControl("lblAD") as Label).Text;
str += (gvrow.Cells[6].FindControl("lblEAT") as Label).Text;
str += (gvrow.Cells[7].FindControl("lblEDT") as Label).Text;
str += (gvrow.Cells[8].FindControl("lblDefaultPlatform") as Label).Text;
//str += "
";
}
}
}

var builder = new StringBuilder(str.Length * 5);
foreach (char chr in str)
{
if (builder.Length > 0)
//builder.Append(' '); With Space
builder.Append(""); //without space

builder.AppendFormat("U+{0:X4}", (ushort)chr);
}
string text = builder.ToString();

lblPF.BackColor = System.Drawing.Color.Black;
lblPF.ForeColor = System.Drawing.Color.Aqua;
lblPF.Text = "Selected Train Status: " + text;

}

//This method is used to populate the saved checkbox values
private void PopulateCheckedValues()
{
ArrayList userdetails = (ArrayList)Session["CHECKED_ITEMS"];
if (userdetails != null && userdetails.Count > 0)
{
foreach (GridViewRow gvrow in gvTrainStatus.Rows)
{
int index = (int)gvTrainStatus.DataKeys[gvrow.RowIndex].Value;
if (userdetails.Contains(index))
{
CheckBox myCheckBox = (CheckBox)gvrow.FindControl("chkSelect");
myCheckBox.Checked = true;
}
}
}
}
//This method is used to save the checkedstate of values
private void SaveCheckedValues()
{
ArrayList userdetails = new ArrayList();
int index = -1;
foreach (GridViewRow gvrow in gvTrainStatus.Rows)
{
index = (int)gvTrainStatus.DataKeys[gvrow.RowIndex].Value;
bool result = ((CheckBox)gvrow.FindControl("chkSelect")).Checked;
// Check in the Session
if (Session["CHECKED_ITEMS"] != null)
userdetails = (ArrayList)Session["CHECKED_ITEMS"];
if (result)
{
if (!userdetails.Contains(index))
userdetails.Add(index);
}
else
userdetails.Remove(index);
}
if (userdetails != null && userdetails.Count > 0)
Session["CHECKED_ITEMS"] = userdetails;
}

What I have tried:

<asp:GridView ID="gvTrainStatus" runat="server" OnRowEditing="gvTrainStatus_RowEditing" OnRowCancelingEdit="gvTrainStatus_RowCancelingEdit" OnRowUpdating="gvTrainStatus_RowUpdating" AutoPostback="false" AutoGenerateColumns="False" DataKeyNames="TID" OnRowCommand="gvTrainStatus_RowCommand" OnRowDataBound="gvTrainStatus_RowDataBound1" OnRowDeleting="gvTrainStatus_RowDeleting1" Class="table table-striped table-bordered table-hover" Width="100%" PageIndex="10" OnPageIndexChanging="gvTrainStatus_PageIndexChanging" AllowPaging="True" BackColor="LightGoldenrodYellow" BorderColor="Tan" BorderWidth="1px" CellPadding="2" ForeColor="Black" GridLines="None">
<columns>
<asp:templatefield>
<headertemplate>
<asp:CheckBox ID="ChkSelectData" runat="server" onclick="CheckAll(this);" />

<itemtemplate>
<asp:CheckBox ID="ChkSelect" runat="server" />

<asp:TemplateField HeaderText="Train No">
<edititemtemplate>
<asp:TextBox ID="txtTrainNo" runat="server" Text='<%# Bind("TrainNo") %>' CssClass="form-control" Width="80px">

<itemtemplate>
<asp:Label ID="lblTrainNo" runat="server" Text='<%# Bind("TrainNo") %>'>

<ControlStyle Font-Bold="True" ForeColor="BlueViolet" />
<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="Train Name">
<edititemtemplate>
<asp:TextBox ID="txtTrainName" runat="server" Text='<%# Bind("TrainName") %>' CssClass="form-control">

<itemtemplate>
<asp:Label ID="lblTrainName" runat="server" Text='<%# Bind("TrainName") %>'>

<ControlStyle Font-Bold="True" ForeColor="Turquoise" />
<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="Schedule Arrival">
<edititemtemplate>
<asp:TextBox ID="txtScheduleArrival" runat="server" Text='<%# Bind("ScheduleArrival") %>' CssClass="form-control" Width="60px">

<itemtemplate>
<asp:Label ID="lblScheduleArrival" runat="server" Text='<%# Bind("ScheduleArrival") %>' Width="60px">

<ControlStyle Font-Bold="True" ForeColor="Tomato" />
<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="Schedule Departure">
<edititemtemplate>
<asp:TextBox ID="txtScheduleDeparture" runat="server" Text='<%# Bind("ScheduleDeparture") %>' CssClass="form-control" Width="60px">

<itemtemplate>
<asp:Label ID="lblScheduleDeparture" runat="server" Text='<%# Bind("ScheduleDeparture") %>' Width="60px">

<ControlStyle Font-Bold="True" ForeColor="Teal" />
<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="AD">
<edititemtemplate>
<asp:TextBox ID="txtAD" runat="server" Text='<%# Bind("AD") %>' CssClass="form-control" Width="40px">

<itemtemplate>
<asp:Label ID="lblAD" runat="server" CssClass="btn btn-primary btn-sm" Text='<%# Bind("AD") %>'>

<ControlStyle Font-Bold="True" />
<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="Train Status">
<itemtemplate>
<asp:DropDownList ID="ddlTrainStatus" runat="server" CssClass="btn btn-success dropdown-toggle" Width="90px">

<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="LATE">
<ItemStyle />
<itemtemplate>
<asp:DropDownList ID="ddlLATE" runat="server" Width="60px" CssClass="btn btn-warning dropdown-toggle" OnSelectedIndexChanged="ddlLATE_SelectedIndexChanged">
<asp:listitem>0
<asp:listitem>1
<asp:listitem>2
<asp:listitem>3
<asp:listitem>4
<asp:listitem>5
<asp:listitem>6
<asp:listitem>7
<asp:listitem>8
<asp:listitem>9
<asp:listitem>10
<asp:listitem>11
<asp:listitem>12
<asp:listitem>13
<asp:listitem>14
<asp:listitem>15
<asp:listitem>16
<asp:listitem>17
<asp:listitem>18
<asp:listitem>19
<asp:listitem>20
<asp:listitem>21
<asp:listitem>22
<asp:listitem>23
<asp:listitem>24
:
<asp:DropDownList ID="ddlLATE2" runat="server" Width="60px" CssClass="btn btn-info dropdown-toggle">
<asp:listitem>0
<asp:listitem>1
<asp:listitem>2
<asp:listitem>3
<asp:listitem>4
<asp:listitem>5
<asp:listitem>6
<asp:listitem>7
<asp:listitem>8
<asp:listitem>9
<asp:listitem>10
<asp:listitem>11
<asp:listitem>12
<asp:listitem>13
<asp:listitem>14
<asp:listitem>15
<asp:listitem>16
<asp:listitem>17
<asp:listitem>18
<asp:listitem>19
<asp:listitem>20
<asp:listitem>21
<asp:listitem>22
<asp:listitem>23
<asp:listitem>24
<asp:listitem>25
<asp:listitem>26
<asp:listitem>27
<asp:listitem>28
<asp:listitem>29
<asp:listitem>30
<asp:listitem>31
<asp:listitem>32
<asp:listitem>33
<asp:listitem>34
<asp:listitem>35
<asp:listitem>36
<asp:listitem>37
<asp:listitem>38
<asp:listitem>39
<asp:listitem>40
<asp:listitem>41
<asp:listitem>42
<asp:listitem>43
<asp:listitem>44
<asp:listitem>45
<asp:listitem>46
<asp:listitem>47
<asp:listitem>48
<asp:listitem>49
<asp:listitem>50
<asp:listitem>51
<asp:listitem>52
<asp:listitem>53
<asp:listitem>54
<asp:listitem>55
<asp:listitem>56
<asp:listitem>57
<asp:listitem>58
<asp:listitem>59
<asp:listitem>60

<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="EAT ">
<edititemtemplate>
<asp:TextBox ID="txtEAT" runat="server" Text='<%# Bind("EAT") %>' CssClass="form-control" Width="90px">

<itemtemplate>
<asp:Label ID="lblEAT" runat="server" Text='<%# Bind("EAT") %>'>

<ControlStyle Font-Bold="True" ForeColor="SaddleBrown" />
<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="EDT ">
<edititemtemplate>
<asp:TextBox ID="txtEDT" runat="server" Text='<%# Bind("EDT") %>' CssClass="form-control" Width="80px">

<itemtemplate>
<asp:Label ID="lblEDT" runat="server" Text='<%# Bind("EDT") %>'>

<ControlStyle Font-Bold="True" ForeColor="SandyBrown" />
<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="Default Platform">
<itemtemplate>
<asp:DropDownList ID="ddlDefaultPlatform" runat="server" CssClass="btn btn-danger dropdown-toggle">
<asp:listitem>
<asp:listitem>1
<asp:listitem>2
<asp:listitem>3
<asp:listitem>4
<asp:listitem>5
<asp:listitem>6
<asp:listitem>7
<asp:listitem>8
<asp:listitem>9
<asp:listitem>10
<asp:listitem>11
<asp:listitem>12
<asp:listitem>13
<asp:listitem>14
<asp:listitem>15
<asp:listitem>16
<asp:listitem>17
<asp:listitem>18
<asp:listitem>19
<asp:listitem>20
<asp:listitem>21
<asp:listitem>22
<asp:listitem>23
<asp:listitem>24

<asp:Label ID="lblDefaultPlatform" runat="server" Text='<%# Bind("DefaultPlatform") %>'>

<HeaderStyle ForeColor="#ffff00" />

<%-- <asp:TemplateField HeaderText="Hide" >
<itemtemplate>
<asp:LinkButton ID="lnkHide" runat="server" Text="Hide" OnClick="lnkHide_Click" />

<asp:BoundField DataField="Name" HeaderText="Name" />--%>

<asp:TemplateField HeaderText="COD">
<edititemtemplate>
<asp:CheckBox ID="chkCOD" runat="server" class="checkbox" />

<itemtemplate>
<asp:CheckBox ID="chkOCD" runat="server" CssClass="btn btn-info btn-sm" />

<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="AGDB">
<edititemtemplate>
<asp:CheckBox ID="chkAGDB" runat="server" class="checkbox" />

<itemtemplate>
<asp:CheckBox ID="chkAGDB" runat="server" CssClass="btn btn-warning btn-sm" />

<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="SLDB">
<edititemtemplate>
<asp:CheckBox ID="chkSLDB" runat="server" class="checkbox" />

<itemtemplate>
<asp:CheckBox ID="chkSLDB" runat="server" CssClass="btn btn-success btn-sm" />

<HeaderStyle ForeColor="#ffff00" />

<%--<asp:templatefield>
<itemtemplate>
<asp:LinkButton ID="LinkButton1" runat="server" Text="Click1" OnClick="LinkButton1_Click" />

--%>

<asp:TemplateField HeaderText="Ann..">
<itemtemplate>
<asp:Button ID="Button1" runat="server" Text="Sound" CssClass="btn btn-danger"
CommandArgument="Button1" OnClick="Button1_Click" />

<HeaderStyle ForeColor="#ffff00" />

<asp:TemplateField HeaderText="Send">
<itemtemplate>
<asp:Button ID="Button2" runat="server" Text="Send" CssClass="btn btn-success"
CommandArgument="Button1" OnClick="Button2_Click" />

<HeaderStyle ForeColor="#ffff00" />

<asp:CommandField ShowEditButton="True" EditText="Save" ControlStyle-ForeColor="BlueViolet" ControlStyle-BorderStyle="Inset">
<ControlStyle BorderStyle="Inset" ForeColor="BlueViolet" />

<asp:TemplateField HeaderText="Delete">
<itemtemplate>
<asp:Button ID="deleteButton" runat="server" CommandName="Delete" Text="Delete" ControlStyle-CssClass="btn btn-primary btn-sm"
OnClientClick="return confirm('Are you sure you want to delete this user?');" />

<HeaderStyle ForeColor="#ffff00" />

<FooterStyle BackColor="Tan" />
<HeaderStyle BackColor="black" Font-Bold="True" />
<PagerSettings FirstPageText="First Page" LastPageText="Last Page" />
<PagerStyle CssClass="pgr" BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" />
<AlternatingRowStyle CssClass="alt" BackColor="PaleGoldenrod" />
<SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />
<SortedAscendingCellStyle BackColor="#FAFAE7" />
<SortedAscendingHeaderStyle BackColor="#DAC09E" />
<SortedDescendingCellStyle BackColor="#E1DB9C" />
<SortedDescendingHeaderStyle BackColor="#C2A47B" />

function CheckAll(Checkbox) {
var GridVwHeaderCheckbox = document.getElementById("<%=gvTrainStatus.ClientID %>");
for (i = 1; i < GridVwHeaderCheckbox.rows.length; i++) {
GridVwHeaderCheckbox.rows[i].cells[0].getElementsByTagName("INPUT")[0].checked = Checkbox.checked;
}
}

Posted 17-Sep-18 23:32pm

Shahbaz435

Updated 18-Sep-18 1:02am

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nishad brahmbhatt · Answer 1 · 2018-09-18T01:03:00

You can use Session or query string

<asp:templatefield>
    <itemtemplate>
        <asp:CheckBox ID="flexCheckBoxList" runat="server" 
                      AutoPostBack="True" OnCheckedChanged="Check_Clicked" />
    </itemtemplate>
</asp:templatefield>

protected void Check_Clicked(Object sender, EventArgs e) 
{
    // Store the check box name, ID or whatever unique value you want in Session here
    CheckBox theCheckBox = sender as CheckBox;

    // Was the check box found?
    if(theCheckBox != null)
    {
        // Store in Session
        Session["CheckBoxValue"] = theCheckBox.SomePropertyValue;
    }
}