how to add new page in C# asp net webform

mr Gupta

how should i fill a page in magtrix form?

i have used 2D-panel  and i fill a table inside a loop and 

panels[row, col] = new Panel();
panels[row, col] = new Panel();
panels[row, col].Controls.Add(mytable);
this.form2.Controls.Add(panels[row, col]);
col++;
if (col == 3){
    row++;
    if(row!=(GridView1.Rows.Count/3)+1)
        col = 0;
}

but it doesnt show in matrix only in rows???!!!

when i use this.Controls.Add(form2); after the loop, i get error:

Control 'ctl02' of type 'LinkButton' must be placed inside a form tag with runat=server.

while is have defined  HtmlForm form2 = new HtmlForm(); and i have dynamically linkbutton in table. even i have defined:

  how should fix the error???!!

when i use form2.Controls.Add(panels[row, col]); instead of this.form2.Controls.Add(panels[row, col]); and add 

this.Controls.Add(form2); after the loop, the page is empty???!!! why is that?

i appreciate your respond with codes, kind regards

hello mr Aman Gupta

thanks for your respond, but it wasnt any button or linkbutton for next or previous page!??

if so i must redirect to next page!!!???

i have put pagesize=10000, for insurance.... 

thanks if you answer with codes...kind regards

Hi Venus,

To handle large datasets like your 2000 rows in a GridView, you can implement paging to display the data across multiple pages. Here’s how you can achieve this in C# ASP.NET WebForms:

Step 1: Enable Paging in the GridView

Enable paging directly on the GridView control by setting its AllowPaging property to true and defining the PageSize.

Step 2: Bind Data to the GridView

In your code-behind, bind the data to the GridView. Make sure you only bind the data when the page is not being posted back (i.e., on the first load).

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        BindGridView();
    }
}

private void BindGridView()
{
    // Assuming you have a method to fetch data from your data source
    DataTable dt = GetDataFromDatabase(); // Replace with your data fetching logic
    GridView1.DataSource = dt;
    GridView1.DataBind();
}

private DataTable GetDataFromDatabase()
{
    // Example method to get data - replace this with your actual database code
    DataTable dt = new DataTable();
    dt.Columns.Add("ID");
    dt.Columns.Add("Name");
    for (int i = 1; i <= 2000; i++)
    {
        dt.Rows.Add(i, "Name " + i);
    }
    return dt;
}

Step 3: Handle Page Index Changing Event

To navigate between pages, handle the PageIndexChanging event of the GridView.

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    GridView1.PageIndex = e.NewPageIndex;
    BindGridView();
}

Step 4: (Optional) Customize Paging Appearance

If you want to customize the appearance of the paging controls (e.g., showing first, previous, next, and last buttons), you can do this in the GridView's PagerSettings.

Complete Example Code

Here’s how the complete implementation would look:

ASP.NET WebForm (ASPX):

Code-Behind (C#):

using System;
using System.Data;
using System.Web.UI.WebControls;

public partial class WebForm1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindGridView();
        }
    }

    private void BindGridView()
    {
        DataTable dt = GetDataFromDatabase();
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }

    private DataTable GetDataFromDatabase()
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("ID");
        dt.Columns.Add("Name");
        for (int i = 1; i <= 2000; i++)
        {
            dt.Rows.Add(i, "Name " + i);
        }
        return dt;
    }

    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        BindGridView();
    }
}

Conclusion

With the above code, you’ll have a GridView that displays 10 rows per page and allows users to navigate through the pages to view all 2000 rows. This approach makes your web application more user-friendly and efficient when dealing with large datasets.