Introduction:
In this article I will explain how to implement cascading dropdownlist in gridview using asp.net.
Description:
In Previous posts I explained clearly how to implement ajax cascading dropdownlist using asp.net and lot of articles regarding Gridview. Now I will explain how to implement cascading dropdown list in gridview using asp.net. Here I am using previous implemented article ajax cascading dropdownlist in asp.net to bind data to dropdownlists.
After that I am binding the data to gridview for that first design table in database and give name UserInfomation
ColumnName
|
ColumnName
|
DataType
|
|
UserId
|
Int(set
identity property=true)
|
|
UserName
|
varchar(50)
|
|
LastName
|
varchar(50)
|
|
Location
|
varchar(50)
|
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Cascading Dropdownlist Sample</title>
</head>
<body>
<form id="form1" runat="server">
<ajax:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"/>
<div>
<asp:GridView runat="server" ID="gvdetails" DataSourceID="dsdetails" AllowPaging="true" PageSize="10" AutoGenerateColumns="false" ShowFooter="true">
<RowStyle BackColor="#EFF3FB" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField HeaderText="UserId">
<ItemTemplate>
<asp:Label ID="lblUserId" runat="server" Text='<%#Eval("UserId") %>'/>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="UserName">
<ItemTemplate>
<asp:Label ID="lblUserName" runat="server" Text='<%#Eval("UserName") %>'/>
</ItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="ddlCountry" runat="server"></asp:DropDownList>
<ajax:CascadingDropDown ID="CountryCascading" runat="server" Category="Country" TargetControlID="ddlCountry" LoadingText="Loading Countries..." PromptText="Select Country" ServiceMethod="BindCountrydropdown" ServicePath="DropdownWebService.asmx">
</ajax:CascadingDropDown>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="LastName">
<ItemTemplate>
<asp:Label ID="lblLastName" runat="server" Text='<%#Eval("LastName") %>'/>
</ItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="ddlState" runat="server"></asp:DropDownList>
<ajax:CascadingDropDown ID="StateCascading" runat="server" Category="State" TargetControlID="ddlState" ParentControlID="ddlCountry" LoadingText="Loading States..." PromptText="Select State" ServiceMethod="BindStatedropdown" ServicePath="DropdownWebService.asmx">
</ajax:CascadingDropDown>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Location">
<ItemTemplate>
<asp:Label ID="lblLocation" runat="server" Text='<%#Eval("Location") %>'/>
</ItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="ddlregion" runat="server"></asp:DropDownList>
<ajax:CascadingDropDown ID="RegionCascading" runat="server" Category="Region" TargetControlID="ddlregion" ParentControlID="ddlState" LoadingText="Loading Cities..." PromptText="select" ServiceMethod="BindRegiondropdown" ServicePath="DropdownWebService.asmx">
</ajax:CascadingDropDown>
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="dsdetails" runat="server" ConnectionString="<%$ConnectionStrings:dbconnection %>"
SelectCommand="select * from UserInformation"/>
</div>
</form>
</body>
</html>
If you observe above code I used ajax cascading dropdownlist to bind in gridview. To bind data to dropdownlist and data tables design check this post ajax cascading dropdownlist using asp.net .After completion of bind data to dropdownlists use above code to place dropdownlist in gridview and bind data to gridview if you have any doubts just download the attached code to and check the details.
Here don’t forgot to set the connection string in web.config file here I am getting database connection from web.config file for that reason you need to set the connectionstring in web.config file like this
<connectionStrings>
<add name="dbconnection" connectionString="Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB"/>
</connectionStrings>
Demo
