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Split a Gridview in two Grids in c#.net

I have a GridView which gets the data from a SQL Server database.
The GridView binds when the user select the date from an CalendarExtender, because the data is different one day to another, also the rows quantity.
E. G., in Saturdays the GridView is filled with 18 rows. In Tuesdays, with 58.
Concern:
What I need to do is to split the GridView in 2 parts (2 GridViews). E. G., In tuesdays, 29 rows each GridView, in saturdays, 9 rows each.
I have tried:
To bring the daily data into a GridView, called "GVTotal":
if (Weekday.Value == "Saturday")
{
GVTotal.DataSourceID = SaturdayData.ID;
GVTotal.DataBind();
}
To count the rows from GVTotal, and divide by 2.
int everything = GVTotal.Rows.Count;
int half = everything / 2;
What I want to do now, is to "Copy" the rows from 0 to half to GVPart1, and from half to everything to GVPart2, in the exactly same order than in GVTotal.
I have read that maybe using a DataTable will made this possible.
I am not pretty sure how to do that. Could someone help me please?

You could have a Repeater with two items, one for each GridView. In the example below, the Repeater is rendered as a table with a single row. Each GridView is in a cell of that row, with an empty cell between them.
<asp:Repeater ID="repeater1" runat="server" OnItemDataBound="repeater1_ItemDataBound">
<HeaderTemplate>
<table cellspacing="0" cellpadding="0">
<tr>
</HeaderTemplate>
<ItemTemplate>
<td>
<asp:GridView ID="gvHalf" runat="server" >
...
</asp:GridView>
</td>
</ItemTemplate>
<SeparatorTemplate>
<td style="width: 32px;" />
</SeparatorTemplate>
<FooterTemplate>
</tr>
</table>
</FooterTemplate>
</asp:Repeater>
In order to get the two data sources, you declare two DataTables in your class:
private DataTable dtTopHalf;
private DataTable dtBottomHalf;
In Page_Load, the two DataTables are populated by splitting the full DataTable in two parts, and the data source of the Repeater is set to two boolean values:
void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
using (SqlConnection conn = new SqlConnection("Data Source=(local); Integrated Security = True; Initial Catalog=TestMP"))
using (SqlCommand cmd = new SqlCommand("SELECT * FROM Clients ORDER BY ClientID ASC", conn))
{
cmd.CommandType = CommandType.Text;
SqlDataAdapter dataAdapter = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
dataAdapter.Fill(dt);
int halfCount = dt.Rows.Count / 2;
dtTopHalf = dt.AsEnumerable().Select(x => x).Take(halfCount).CopyToDataTable();
dtBottomHalf = dt.AsEnumerable().Select(x => x).Skip(halfCount).CopyToDataTable();
}
// Each value in the Repeater indicates if it is the top half or not
repeater1.DataSource = new List<bool>() { true, false };
repeater1.DataBind();
}
}
The specific data source can then be set for each GridView in the ItemDataBound event handler of the Repeater:
protected void repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
bool isTopHalf = (bool)e.Item.DataItem;
GridView gvHalf = e.Item.FindControl("gvHalf") as GridView;
gvHalf.DataSource = isTopHalf ? dtTopHalf : dtBottomHalf;
gvHalf.DataBind();
}
}
Note 1: The Repeater allows to share the same markup for both GridViews. If you prefer, you can declare two separate GridViews in the markup and apply the specific data source to each one in Page_Load.
Note 2: You need a reference to System.Data.DataSetExtensions in your project to use some of the LINQ methods mentioned above.

Thanks to ConnorsFan for the assistance. His answer is the right way to do what I wanted.
As I need to select the date before the data comes in, I wrote Connor's code into my date Textbox OnTextChanged event, into the if (Weekday.Value == "<day of the week>") statement.
This is the solution:
ASPX:
Updated: Only with one GridView, as reccomended:
<asp:Repeater ID="repeater1" runat="server" OnItemDataBound="repeater1_ItemDataBound">
<HeaderTemplate>
<table cellspacing="200px" cellpadding="0">
<tr style="vertical-align: top;">
</HeaderTemplate>
<ItemTemplate>
<td>
<asp:GridView ID="gvHalf" runat="server" BackColor="White" AutoGenerateColumns="False" HeaderStyle-CssClass="tituloshandoff" RowStyle-CssClass="contenidohandoffbatch">
<Columns>
<asp:BoundField HeaderText="IDBATCH" DataField="IDBatch" SortExpression="IDBatch" HeaderStyle-CssClass="TituloInvisible" ItemStyle-CssClass="TituloInvisible" />
<asp:BoundField HeaderText="BATCH" DataField="Nombre" SortExpression="Nombre" />
<asp:BoundField HeaderText="DEALER" DataField="DealerCodigo" SortExpression="DealerCodigo" />
<asp:BoundField HeaderText="CT TIME" DataField="CTStart" SortExpression="CTStart" />
<asp:BoundField HeaderText="STATUS" DataField="Estado" SortExpression="Estado" />
<asp:TemplateField HeaderText="CONTROL">
<ItemTemplate>
<asp:Button ID="Button1" CssClass="botongrid" runat="server" Text="Select" Width="100px" /></ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</td>
</ItemTemplate>
<SeparatorTemplate>
<td style="width: 100px;" />
</SeparatorTemplate>
<FooterTemplate>
</tr>
</table>
</FooterTemplate>
</asp:Repeater>
C#:
I will show only one day in example:
string LaConexion = #"<My Connection String>";
private DataTable dtTopHalf;
private DataTable dtBottomHalf;
protected void TextDate_TextChanged(object sender, EventArgs e)
{
if (diasemana.Value == "Monday")
{
using (SqlConnection conexion = new SqlConnection(LaConexion))
using (SqlCommand comando = new SqlCommand("SELECT [1Monday].IDBatch, Batch.Nombre, Dealer.DealerCodigo, Batch.CTStart, BatchDatos.Estado FROM [1Monday] INNER JOIN Batch ON [1Monday].IDBatch = Batch.IDBatch INNER JOIN Dealer ON Batch.IDDealer = Dealer.IDDealer LEFT OUTER JOIN BatchDatos ON [1Monday].ID = BatchDatos.ID ORDER BY Batch.CTStart", conexion))
{
comando.CommandType = CommandType.Text;
SqlDataAdapter dataAdapter = new SqlDataAdapter(comando);
DataTable dt = new DataTable();
dataAdapter.Fill(dt);
int halfCount = dt.Rows.Count / 2;
dtTopHalf = dt.AsEnumerable().Select(x => x).Take(halfCount).CopyToDataTable();
dtBottomHalf = dt.AsEnumerable().Select(x => x).Skip(halfCount).CopyToDataTable();
}
// Each value in the Repeater indicates if it is the top half or not
repeater1.DataSource = new List<bool>() { true, false };
repeater1.DataBind();
}
}
A Picture:

How to bind gridview with data by using loop?

I have written code like below lines of code
protected void grdView_DataBinding(object sender, EventArgs e)
{
LicenceBL lbl = new LicenceBL(0);
DataSet lds = new DataSet();
lbl.FetchForEdit(lds, LicenseType);
foreach (GridViewRow row in grdView.Rows)
{
Label lblJurisdiction = row.FindControl("lblJurisdiction") as Label;
TextBox txtDateIssued = row.FindControl("txtEffectiveDate") as TextBox;
TextBox txtDateExpiration = row.FindControl("txtExpirationDate") as TextBox;
TextBox txtLicenseNumber = row.FindControl("txtLicenseNumber") as TextBox;
for (int i = 0; i < lds.Tables[0].Rows.Count; i++)
{
txtLicenseNumber.Text = lds.Tables[0].Rows[i]["LicenceNumber"].ToString();
}
}
}
I want to bind grid view without using datasource property of gridview. The above code is not working...
Let's Suppose lds contains data like
=====================================================
LicenceNumber - LicenceIssueDate
123 - 12/10/2014
345 - 12/1/2013
=====================================================
Similarily Grid will also contain the data
=====================================================
LicenceNumber - LicenceIssueDate
123 - 12/10/2014
345 - 12/1/2013
=====================================================
Here is grid view's design
<asp:GridView ID="grdView" AutoGenerateColumns="false" OnDataBinding="grdView_DataBinding" BorderWidth="0" runat="server" CssClass="table">
<Columns>
<asp:TemplateField HeaderText="License Number">
<ItemTemplate>
<asp:TextBox ID="txtLicenseNumber" style="padding:12px 5px;" runat="server" />
<br />
<asp:RequiredFieldValidator ID="ValReqLN" Display="Dynamic" runat="server"
ErrorMessage="License Number cannot be Blank." ControlToValidate="txtEffectiveDate"></asp:RequiredFieldValidator>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Effective Date">
<ItemTemplate>
<asp:TextBox ID="txtEffectiveDate" style="padding:12px 5px;" placeholder="(mm/dd/yyyy)" CssClass="datepiker" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Please help!!!

Why would you not use datasource property ? you said: "i want to bind gridview programically because I have to give many conditions inside gridview's rows according to business logic in order to display data in the gridview.
Here is how you can do that:
Code behind:
protected void grdView_DataBinding(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataRowView drv = e.Row.DataItem as DataRowView;
if (drv["txtLicenseNumber"].ToString().ToLower() == "abc")
{
//Apply business logic here on each row, hide/show etc
e.Row.CssClass = "highlighted";
}
}
}
Read more here on:
Dynamically change GridView Cell value using RowDataBound event in ASP.Net using C# and VB.Net
Selectively apply css to a row in a gridview

Gridview rowdatabound error : Multiple controls with the same ID 'hlLink' were found. FindControl requires that controls have unique ID

I have a gridview that has link and description to be rendered on the page.
written the below code in gridview in .aspx
<Columns>
<asp:TemplateField>
<ItemTemplate>
<p>
<asp:HyperLink ID="hlLink" runat="server" Target="_self"></asp:HyperLink></p>
</ItemTemplate>
<ItemTemplate>
<p>
<asp:Literal ID="litSummary" runat="server"></asp:Literal></p>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<AlternatingItemTemplate>
<p>
<asp:HyperLink ID="hlLink" runat="server" Target="_self"></asp:HyperLink></p>
</AlternatingItemTemplate>
<AlternatingItemTemplate>
<p>
<asp:Literal ID="litSummary" runat="server"></asp:Literal></p>
</AlternatingItemTemplate>
</asp:TemplateField>
</Columns>
and below in .aspx.csin gridview rowdataboundevent
protected void gvResults_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
SearchResultItem data = (SearchResultItem)e.Row.DataItem;
HyperLink hlLink = (HyperLink)e.Row.FindControl("hlLink");
Literal litSummary = (Literal)e.Row.FindControl("litSummary");
if (data.Description != null)
{
hlLink.Text = data.Title;
hlLink.NavigateUrl = data.Path.Replace("&", "&");
litSummary.Text = data.Description;
}
else
{
hlLink.Text = data.Path;
hlLink.NavigateUrl = data.Path.Replace("&", "&");
litSummary.Text = data.Path;
}
}
here SearchResultItem: is the result item that has link and description details.
First time when row bound event is called, it binds the data correctly, second time when called throws error "Multiple controls with the same ID 'hlLink' were found. FindControl requires that controls have unique IDs.
Please let me know whats error with the code.
Thanks

Problem : you are trying to create the same controls with same ID multiple times.
Solution : you need to remove the controls before creating them.
Try This:
void RemoveControls()
{
HyperLink l1 = (HyperLink)Page.FindControl("hlLink");
Literal l2 = (Literal)Page.FindControl("litSummary");
if(l1!= null)
Page.Controls.Remove(l1);
if(l2!= null)
Page.Controls.Remove(l2);
}
Solution 2: Pagination for Repeater control.
for implementing pagination in Repeater control you need to create PagedDataSource.
Try This:
PagedDataSource pds = new PagedDataSource();
pds.DataSource = ds.Tables[0].DefaultView;
pds.AllowPaging = true;
pds.PageSize = 8;//page sizes

Trying to access the label in ListView

I have a ListView control with DataPager, i am trying to show results from database into ListView the database have field in which i have store content from ajaxhtmlextender i have bind ListView with database like this
protected void ListEvents()
{
conn = new SqlConnection(connSting);
cmdListEvent = new SqlCommand("SELECT * FROM LatestEvents",conn);
table = new DataTable();
conn.Open();
adpter = new SqlDataAdapter(cmdListEvent);
adpter.Fill(table);
ListEvent.DataSource = table;
ListEvent.DataBind();
conn.Close();
}
and the .aspx file
<asp:ListView ID="ListEvent" runat="server"
OnItemDataBound="ListEvent_ItemDataBound" >
<LayoutTemplate>
<asp:PlaceHolder runat="server" ID="itemPlaceholder"></asp:PlaceHolder>
</LayoutTemplate>
<ItemTemplate>
<div class="contmainhead">
<h1 id="evhead"><asp:Label ID="LabelTittle" runat="server"><%#Eval("Tittle") %></asp:Label></h1>
</div>
<div class="contmain">
<asp:Label ID="LabelBody" runat="server"> <%#Eval("Body") %></asp:Label>
</div>
</ItemTemplate>
</asp:ListView>
It is giving the intended results but the problem is the label
<asp:Label ID="LabelBody" runat="server"> <%#Eval("Body") %></asp:Label>
showing all the formatted text and images as html markup, i know to work the label perfectly i have to use this function
Server.HtmlDecode();
i tried it like this
protected void ListEvent_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
Label LabelBody = (Label)e.Item.FindControl("LabelBody");
LabelBody.Text = Server.HtmlDecode(LabelBody.Text);
}
}
But the label shows nothing. . so how can i make the label show the content correctly?
Your help will be greatly appreciated . .Thanx

protected void ListEvent_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
ListViewDataItem dataItem = (ListViewDataItem) e.Item;
Label LabelBody = (Label)e.Item.FindControl("LabelBody");
LabelBody.Text = (string) DataBinder.Eval(dataItem.DataItem, "Body");
}
}
Please make sure there is a column named in your returned datatable
and also remove the <%# EVAL %> tag from the text attribute of your label, leave it empty or do not specify the attribute in your aspx

try
<asp:Label ID="LabelBody" runat="server" text='<%#Eval("Body") %>' />
EDIT :
if the above didn't work try :
<asp:Label ID="LabelBody" runat="server" text="<% #Eval("Body").ToString() %>" />

Grid view Dropdown list data binding error

Am using the below code to bind the dropdown data from another table. And also refer that control name using rowindex. But it always return null.And also return the error message.
`Object reference not set to an instance of an object.`
Am using the two method, but both return the control name null
First code:
protected void GridView2_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Control ctrl = e.Row.FindControl("DDL_STATUS_FT"); //It always return null
if (ctrl != null)
{
DropDownList dd = ctrl as DropDownList;
DataSet7TableAdapters.sp_getall_trv_masterTableAdapter TA = new DataSet7TableAdapters.sp_getall_trv_masterTableAdapter();
DataSet7.sp_getall_trv_masterDataTable DS = TA.GetData();
dd.DataTextField = "fld_TName";
dd.DataValueField = "fld_id";
dd.DataSource = DS;
dd.DataBind();
}
}
}
Second :
In databind function
if (DS.Rows.Count > 0)
{
GridView2.DataSource = DS;
GridView2.DataBind();
foreach (GridViewRow grdRow in GridView2.Rows)
{
DataSet7TableAdapters.sp_getall_trv_masterTableAdapter TA1 = new DataSet7TableAdapters.sp_getall_trv_masterTableAdapter();
DataSet7.sp_getall_trv_masterDataTable DS1 = TA1.GetData();
// Nested DropDownList Control reference is passed to the DrdList object. This will allow you access the properties of dropdownlist placed inside the GridView Template column.
DropDownList drdList = (DropDownList)(GridView2.Rows[grdRow.RowIndex].Cells[4].FindControl("DDL_STATUS_FT"));//It always return null
// DataBinding of nested DropDownList Control for each row of GridView Control.
drdList.DataSource = DS1;
drdList.DataValueField = "fld_id";
drdList.DataTextField = "fld_TName";
drdList.DataBind();
}
}
Please help me to do this..
<asp:TemplateField ItemStyle-Width="100px" HeaderText="TYPE">
<ItemTemplate>
<asp:DropDownList ID="DDL_STATUS" runat="server" AutoPostBack="true" Enabled="false" >
</asp:DropDownList>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="DDL_edit_STATUS" runat="server" AutoPostBack="true" SelectedValue='<%# Eval("fld_Type") %>'>
</asp:DropDownList>
</EditItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="DDL_STATUS_FT" runat="server" AutoPostBack="true">
</asp:DropDownList>
</FooterTemplate>
</asp:TemplateField>

The DropDown "DDL_STATUS_FT" is in Footer Template..You must check it as follow..
if(e.Row.RowType == DataControlRowType.Footer)
{
DropDownList ctrl =(DropDownList)e.Row.Cells[CellIndex].FindControl("DDL_STATUS_FT");
}

Try to find your control by cell and cellIndex like...
Control ctrl = e.Row.Cells[yourCellIndex].FindControl("DDL_STATUS_FT");

EDITED2
you must have dropdownlist in aspx code in gridview item-template
you are finding using e.row.findcontrol without declaring it so abusively it return null
so, fist add dropdownlist into your gridview
here is a sample of your dropdownlist
<asp:TemplateField ItemStyle-Width="30px" HeaderText="DDL_STATUS_FT">
<ItemTemplate>
<asp:Dropdownlist ID="DDL_STATUS_FT" runat="server" />
</ItemTemplate>
</asp:TemplateField>
if you got null ctrl
Control ctrl = e.Row.FindControl("DDL_STATUS_FT"); //It always return null
then make sure in your aspx code DDL_STATUS_FT Control is runat="server"