First thing.
You have used TemplateField and added the OnCheckChanged Event in EditItemTemplate then how ItemTemplate CheckBox will raise the event.
Secondly if you have used TemplateField then you need to find the label value. This should be your code.
HTML
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
runat="server" AutoGenerateColumns="False" AutoGenerateSelectButton="True">
<Columns>
<asp:TemplateField HeaderText="Id">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Id") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("Id") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("Name") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Country">
<EditItemTemplate>
<asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("Country") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("Country") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="accpt">
<EditItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" OnCheckedChanged="createfolder" AutoPostBack="true" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<HeaderStyle BackColor="#3AC0F2" ForeColor="White"></HeaderStyle>
</asp:GridView>
</div>
</form>
Namespaces
using System.Data;
using System.IO;
C#
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
new DataColumn("Name", typeof(string)),
new DataColumn("Country",typeof(string)) });
dt.Rows.Add(1, "John Hammond", "United States");
dt.Rows.Add(2, "Mudassar Khan", "India");
dt.Rows.Add(3, "Suzanne Mathews", "France");
dt.Rows.Add(4, "Robert Schidner", "Russia");
GridView1.DataSource = dt;
GridView1.DataBind();
}
}
protected void createfolder(object sender, EventArgs e)
{
CheckBox chk = sender as CheckBox;
GridViewRow row = chk.NamingContainer as GridViewRow;
string name = (row.FindControl("Label2") as Label).Text;
string folderPath = "C:\\CreatedFolders\\" + name;
if (!Directory.Exists(folderPath))
{
Directory.CreateDirectory(folderPath);
}
}