The GridView 'GridView1' fired event PageIndexChanging which wasn't handled - asp.net

Question

I have created:
one master page and one content page called Detail.
On Button click event, displaying data in grid view.
In grid view, columns are autogenerated.
I wanted to show 11 column in grid view, but it is more than page
size.
What to do for this?
I have created sql helper file for database connection code and calling that method, not using sqldatasource for connection.
When I trying to do paging, getting error:
The GridView 'GridView1' fired event PageIndexChanging which wasn't
handled.

Answer 1

You need to declare a method on your code behind that handles the PageIndexChanging event.
Something similar to this:
protected void GridView1_PageIndexChanging (object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
bindGridView(); //bindgridview will get the data source and bind it again
}
private void bindGridView()
{
GridView1.DataSource=getData();
GridView1.DataBind();
}
Providing sample code:
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
bindGridView(); //bindgridview will get the data source and bind it again
}
protected void Page_Load(object sender , EventArgs e)
{
if(!IsPostBack)
bindGridView();
}
//this is some sample data
private void bindGridView()
{
DataTable t = new DataTable();
t.Columns.Add("Col1");
t.Columns.Add("Col2");
DataRow r = null;
for (int i = 0; i < 25; i++)
{
r = t.NewRow();
r.ItemArray = new object[] { "Val" + i, " Another " + i };
t.Rows.Add(r);
}
GridView1.DataSource = t;
GridView1.DataBind();
}
And this is the markup:
<asp:GridView OnPageIndexChanging="GridView1_PageIndexChanging" AllowPaging="true" PageSize="10" ID="GridView1" runat="server" AutoGenerateColumns="true">
Produces this:

Answer 2

For Paging you can use OnPageIndexChanging for this....
For Example
you have to use OnPageIndexChanging="gvdetails_PageIndexChanging" in your GridView...
You have to write below code into event in code behind like
protected void gvdetails_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
gvdetails.PageIndex = e.NewPageIndex;
BindData();
}
For more detail you can check the below link here I am using page Index change in my article...
Here I use PageIndexChange
I hope this will helps you....Share it with others...Thanks!

Answer 3

This is the final answer:
Imports System.Collections.Generic ' library
Protected Sub grdEmployees_PageIndexChanging1(ByVal sender As Object, ByVal e As
System.Web.UI.WebControls.GridViewPageEventArgs) Handles grdEmployees.PageIndexChanging
grdEmployees.PageIndex = e.NewPageIndex
LoadEmployeeList() 'FUNCTION FOR DATASET
grdEmployees.DataBind()
End Sub

Answer 4

you simply add this to your code :
protected void GridViewTrsEmail_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridViewTrsEmail.PageIndex = e.NewPageIndex;
GridViewTrsEmail.DataBind();
}

Answer 5

To fix this, I had to take a closer look at my datasource and datakeys. I have a set of records that are returned from SQL Server and what I was doing is binding them to a POCO. This class had several public properties of type Integer. These Integers were my datakeys on the grid. I replaced their type with a string instead to bypass the casting issue.