Develop Reference

Selection of checkboxes lost during pagination of gridview

I have a problem in gridview, as per requirement i have set No of Records per page = 4 in gridview. I have to select Checkbox against every complaint but problem is then when i got to next pge in gridview and e.g fro 1 to 2 then when i come back to page 1 then it doesn't show TICK in check boxes . It doesn't remember my selection when i browse to and back to page.
<asp:GridView ID="GridViewSmsComplaints" AllowPaging="True" PageSize="4" runat="server" AutoGenerateColumns="False" CssClass="mGrid" BorderColor="#333333" Width="550px" OnPageIndexChanging="GridViewSmsComplaints_PageIndexChanging" >
<Columns>
<asp:BoundField HeaderText="ID" DataField="ID" />
<asp:BoundField HeaderText="Recieving Date" DataField="RecievingDate" />
<%--<asp:BoundField HeaderText="ToMobileNo" DataField="ToMobileNo" /> --%>
<asp:BoundField HeaderText="FromMobileNo" DataField="FromMobileNo" />
<asp:BoundField HeaderText="Message" DataField="Message" >
<ItemStyle Wrap="True" />
</asp:BoundField>
<asp:TemplateField HeaderText="IsComplaint">
<ItemTemplate>
<asp:CheckBox ID="ckboxIsComplaint" runat="server" Checked='<%# Convert.ToBoolean(Eval("IsComplaint").ToString()) %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

please check the above link.here your problem was clearly explained here.i think so it may be helpfull

As per comments...
If you do not update the underlying database by processing the OnCheckChanged event of the check box, then it will simply be reading the same data all the time.
From How to add event for Checkbox click in Asp.net Gridview Column, I have extracted the required information and tried to modify to fit your initial question.
<asp:TemplateField HeaderText="IsComplaint">
<ItemTemplate>
<asp:CheckBox ID="ckboxIsComplaint" runat="server" Checked='<%# Convert.ToBoolean(Eval("IsComplaint").ToString()) %>' OnCheckedChanged="chk_CheckedChanged" AutoPostBack="true/>
</ItemTemplate>
</asp:TemplateField>
add checkbox change event in aspx.cs page
protected void chk_CheckedChanged(object sender, EventArgs e)
{
GridViewRow row = ((GridViewRow)((CheckBox)sender).NamingContainer);
<your data source>.Rows[row.DataItemIndex]["B"] = ((CheckBox)GridViewSmsComplaints.Rows[row.RowIndex].FindControl("ckboxIsComplaint")).Checked;
}

Binding Checkbox with database column

I am binding Checkbox field to database and want to show actual value like if in database it is 1 then checkbox should be ticked in gridview else unchecked. I tried but my code doesn't show avtual value in checkbox, always remain unchecked.
CODE:
<asp:GridView ID="GridViewSmsComplaints" AllowPaging="True" runat="server" AutoGenerateColumns="false" CssClass="mGrid" Width="450px" OnPageIndexChanging="GridViewSmsComplaints_PageIndexChanging" >
<Columns>
<asp:BoundField HeaderText="ID" DataField="ID" />
<asp:BoundField HeaderText="Recieving Date" DataField="RecievingDate" />
<%--<asp:BoundField HeaderText="ToMobileNo" DataField="ToMobileNo" /> --%>
<asp:BoundField HeaderText="FromMobileNo" DataField="FromMobileNo" />
<asp:BoundField HeaderText="Message" DataField="Message" />
<asp:TemplateField HeaderText="IsComplaint">
<ItemTemplate>
<asp:CheckBox ID="ckboxIsComplaint" OnCheckedChanged="ckboxIsComplaint_CheckedChanged" AutoPostBack="true" runat="server" Value='<%# Eval("IsComplaint") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
.cs
SELECT [ID]
,REPLACE(convert(varchar, ReceivedMessages.ReceivedDateTime, 106), ' ','/') as RecievingDate
,[ToMobileNo]
,[FromMobileNo]
,[Message],
[IsComplaint]
FROM [CmsSMSDb].[dbo].[ReceivedMessages]
where Convert(date,ReceivedDateTime)>= #DateFrom AND Convert(date,ReceivedDateTime)<= #DateTo AND IsComplaint=1

If you will get only true or false then you can use the following, by adding
Checked='<%# Convert.ToBoolean(Eval("IsComplaint").ToString()) %>' to the CheckBox.
<asp:CheckBox ID="ckboxIsComplaint" OnCheckedChanged="ckboxIsComplaint_CheckedChanged" AutoPostBack="true" runat="server" Checked='<%# Convert.ToBoolean(Eval("IsComplaint").ToString()) %>' />
If you are getting null value also, then you need to do the checking and unchecking from C# code in RowDataBound event.

Try this
<asp:CheckBoxField DataField="IsComplaint" HeaderText="IsComplaint" SortExpression="IsComplaint" />
instead of using
<asp:TemplateField HeaderText="IsComplaint"> ............. </asp:TemplateField>

How to fix the width for each column in GridView?

How can I fix the width for each column in GridView. My GridView keeps extend along with data in the cell. I need it to skip to new line when it reach the right side of the cell. This is my code in .aspx file:
<asp:GridView ID="GridView1" runat="server"
AutoGenerateColumns="False" DataKeyNames="Emp_ID" DataSourceID="LinqDataSource1"
AllowPaging="True" AllowSorting="True" Width="900px" HorizontalAlign="Center" >
<Columns>
<asp:BoundField DataField="Emp_ID" HeaderText="ID"
InsertVisible="False" ReadOnly="True" SortExpression="Emp_ID"/>
<asp:BoundField DataField="Emp_Username"
HeaderText="Username" SortExpression="Emp_Username" />
<asp:BoundField DataField="Emp_Password"
HeaderText="Password" SortExpression="Emp_Password" />
<asp:BoundField DataField="Emp_Name"
HeaderText="ชื่อพนักงาน" SortExpression="Emp_Name" />
<asp:BoundField DataField="Emp_Address"
HeaderText="ที่อยู่" SortExpression="Emp_Address" />
<asp:BoundField DataField="Emp_Tel"
HeaderText="เบอร์โทรศัพท์" SortExpression="Emp_Tel" />
<asp:TemplateField HeaderText="รูปพนักงาน" SortExpression="Emp_Picture">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Emp_Picture") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Image ID="Image2" runat="server" Height="70px"
ImageUrl='<%# Eval("Emp_Picture", "{0}") %>' Width="50px" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Status" HeaderText="สถานะ"
SortExpression="Status" />
<asp:HyperLinkField DataNavigateUrlFields="Emp_ID"
DataNavigateUrlFormatString="AdminUpdate.aspx?Emp_ID={0}" Text="Edit" />
<asp:TemplateField>
<HeaderTemplate>
<asp:CheckBox ID="ChkSelectAll" runat="server"
AutoPostBack="True" oncheckedchanged="ChkSelectAll_CheckedChanged" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="Chk" runat="server" AutoPostBack="True" oncheckedchanged="Chk_CheckedChanged" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Here's my design view:
As you can see, the first 4 columns has no problem with that until column 5. It keeps extend cause all GridView extend out of the page

Set itemstyle width of every column.For example.
<asp:BoundField DataField="Emp_Address"
HeaderText="ที่อยู่" SortExpression="Emp_Address">
<ItemStyle Width="200px" HorizontalAlign="Left" />
</asp:BoundField>

Wrapping is done based on words so that any single word is not broken in two lines.
So won't work for you if your data has long string without space.
The problem is that you can't insert spaces on your own because that may change the meaning of data.
While showing in grid we show only that long string which can be accommodated in column and then add "..." (only if string is more than what is showing) and then add a tooltip to show the full string.
That way the grid formatting is not compromised and if user wants he can hover his mouse and see the whole string.
hope this helps Example

Try setting the property RowStyle-Wrap of the GridView to True.

You can use ItemStyle-Width to fix the column width ,but in case you enter characters which can not be enclosed in given width (As seen in your image) ,column will expand as per the inputs so you can use RowStyle-Wrap property of gridview
<asp:GridView ID="grdVwtrial" runat="server" RowStyle-Wrap="true">

RowStyle-Wrap==true should work I guess. For more clarifications refer this:
http://forums.asp.net/t/1263769.aspx

Hide cells in GridView based on another column

I have the following GridView:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="SysInvoiceID" DataSourceID="SqlDataSource1">
<Columns>
<asp:BoundField DataField="InvoiceID" HeaderText="SysInvoiceID" ReadOnly="True" SortExpression="SysInvoiceID" />
<asp:BoundField DataField="BillMonth" HeaderText="BillMonth" SortExpression="BillMonth" />
<asp:BoundField DataField="InvoiceDate" HeaderText="InvoiceDate" ReadOnly="True" SortExpression="InvoiceDate" />
<asp:BoundField DataField="InvoiceNumber" HeaderText="InvoiceNumber" SortExpression="InvoiceNumber" />
<asp:BoundField DataField="Net" HeaderText="Net" SortExpression="Net" />
<asp:BoundField DataField="VAT" HeaderText="VAT" SortExpression="VAT" />
<asp:BoundField DataField="Gross" HeaderText="Gross" SortExpression="Gross" />
<asp:ButtonField CommandName="ViewInvoice" HeaderText=" " ShowHeader="True" Text="View" />
</Columns>
</asp:GridView>
The very last column (ButtonField) is one I created myself just to include the text 'View' on each row, which when clicked, will bring up a PDF invoice.
I'm not sure if this is even possible, but I was wondering if it was possible to add some sort of validation for that column or something, so that if the 'InvoiceID' column is blank, the 'View' link on the corresponding row won't show up.
I felt close to doing this by going on split view in Visual Studio and then the 'Edit Columns' button on GridView tasks, but like I said I'm not sure if it's possible to do it this way and may have to resort to simply coding it.
Thanks for any help!

Use a <TemplateField> instead of a <ButtonField>
<asp:TemplateField>
<ItemTemplate>
<asp:Button runat="server" Text="View"
Visible='<%# Eval("IsEmpty(InvoiceID)") %>' CommandName="ViewInvoice" />
</ItemTemplate>
</asp:TemplateField>
And add a method to your page that is IsEmpty(string id) or whatever type your id is, and just check to see if it's empty first.
You can also add a CommandArgument attribute to the Button that will let you specify what the argument to it will be.

Use a placeholder...
<asp:Placeholder runat="server" ID="plView" Visible="<%# Convert.ToBoolean(InvoiceID == null) ? false : true %>">
<asp:ButtonField CommandName="ViewInvoice" HeaderText=" " ShowHeader="True" Text="View" />
</asp:Placeholder>

Add sorting to a Nested Gridview ASP.net with C#

I have searched high and low for how to implement this on my page. I have a top level gridview which allows sorting and nested gridviews which are dynamically generated when the page compiles so 'x' number of nested gridviews which are inside dynamic html divs which can be toggled from invisible to visible at the users command. The problem I have is that I cannot figure out how to allow sorting on these nested gridviews without collapsing the divs/causing a postback.
Below shows how the master gridview (gvSalesDiv) and the nested gridview (gvTheDivisionCustomers) are generated in asp.net
<asp:GridView ID="gvSalesDiv" AllowSorting="true" onsorting="GridView1_Sorting" runat="server" GridLines="Both" OnRowDataBound="gvOrderLineDetail_RowDataBound" AutoGenerateColumns="False"
Width="100%" Height="210px" BackColor="WhiteSmoke" AlternatingRowStyle-BackColor="#DADDE2"
HeaderStyle-Font-Size="Medium" Visible="true">
<Columns>
<asp:TemplateField HeaderText="Toggle Detail">
<ItemTemplate>
<a href="javascript:switchViews('div<%# Eval("SalesDivision") %>');">
<img id="imgdiv<%# Eval("SalesDivision") %>" alt="toggle" border="0"
src="/salesconsole/toggle-off.png" />
</a>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="SalesDivision" HeaderText="Sales Division">
<ItemStyle Font-Bold="True" ForeColor="CornflowerBlue" HorizontalAlign="Center"></ItemStyle>
</asp:BoundField>
<asp:BoundField DataField="LastDay" SortExpression="LastDay" DataFormatString="{0:C}" HeaderText="Last 24 Hours" >
</asp:BoundField>
<asp:BoundField DataField="LastWeek" SortExpression="LastWeek" DataFormatString="{0:C}" HeaderText="Last 7 Days" >
</asp:BoundField>
<asp:BoundField DataField="Last30Days" SortExpression="Last30Days" DataFormatString="{0:C}" HeaderText="Last 30 Days" >
</asp:BoundField>
<asp:BoundField DataField="Last3Months" SortExpression="Last3Months" DataFormatString="{0:C}" HeaderText="Last 3 Months" >
</asp:BoundField>
<asp:BoundField DataField="Last6Months" SortExpression="Last3Months" DataFormatString="{0:C}" HeaderText="Last 6 Months" >
</asp:BoundField>
<asp:BoundField DataField="LastYear" SortExpression="LastYear" DataFormatString="{0:C}" HeaderText="Last Year" >
</asp:BoundField>
<asp:TemplateField>
<ItemTemplate>
<tr>
<td colspan="100">
<div id="div<%# Eval("SalesDivision") %>" style="display:none;position:relative;left:25px;" >
<h3 title="<%# Eval("SalesDivision") %> Sales"><%# Eval("SalesDivision") %> Sales Breakdown</h3>
<asp:GridView ID="gvTheDivisionCustomers" AllowSorting="true" onsorting="GridView2_Sorting" BackColor="WhiteSmoke" AlternatingRowStyle-BackColor="#DADDE2"
Width="100%"
AutoGenerateColumns="false" runat="server">
<Columns>
<asp:TemplateField HeaderText="Show More Detail">
<ItemTemplate>
<a href="sales-customers-detail.aspx?CustomerID=<%# Eval("CustomerID") %>&CustomerName=<%# Eval("CustomerName") %>" target="_blank" style="color:Blue; text-decoration:underline"> More Details
</a>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="CustomerID" HeaderText="ID"/>
<asp:BoundField DataField="CustomerName" HeaderText="Name" />
<asp:BoundField DataField="Last24Hours" HeaderText="Last 24 Hours" SortExpression="LastDay" DataFormatString="{0:C}" />
<asp:BoundField DataField="Last7Days" HeaderText="Last 7 Days" SortExpression="Last7Days" DataFormatString="{0:C}" />
<asp:BoundField DataField="Last30Days" HeaderText="Last 30 Days" SortExpression="Last30Days" DataFormatString="{0:C}" />
<asp:BoundField DataField="Last3Months" HeaderText="Last 3 Months" SortExpression="Last3Months" DataFormatString="{0:C}" />
<asp:BoundField DataField="Last6Months" HeaderText="Last 6 Months" SortExpression="Last6Months" DataFormatString="{0:C}" />
<asp:BoundField DataField="LastYear" SortExpression="LastYear" HeaderText="Last Year" DataFormatString="{0:C}" />
</Columns>
</asp:GridView>
</div>
</td></tr>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
I populate the master gridview on Page_Load and the nested gridviews are created using the OnRowDataBound method. I have a sorting method for the master gridview which works fine as well. Below is the OnSorting method for the nested gridview, which is where I am stuck...I cannot access this object
protected void GridView2_Sorting(Object sender, GridViewSortEventArgs e)
{
// TO DO : Sort the nested gridview....All I can get at is the sort expressions or
cast the sender into a gridview but even then I wouldn't know the correct SQL query to bind with unless I knew which 'div' I was in...
}

So basically we can say, that you are looking for an ID or something wherewith you can create the query for the sorting method?
If that is correct we can find a solution.
Put a new label inside the first gridviews(gvSalesDiv) ItemTemplate like this one:
<asp:Label ID="lblID" runat="server" Text='<%# Bind("Id") %>'></asp:Label>
And in the codebehinde you can find it in this was:
Label lblID = (Label)((GridView)sender).NamingContainer.FindControl("lblID");
Hope it works!

If you are looking for how to get the parent div the gridview resides in, you can use this:
First, you need to cast the sender to a gridview, then create an html element and cast it to the gridview's parent. Like this:
Dim test As Button = CType(sender, Button)
Dim div As HtmlGenericControl
div = CType(test.Parent, HtmlGenericControl)
Dim t As String = test.ID
In this example, I'm casting the sender to a button but you can easily change this. IN this example, you will need to have the div run at the server, using " runat="server"". If you do not want to create it on the server side, you can change how you cast from a HTMLGenericControl to ContentPlaceHolder. Let me know if this helps or you need more information.