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Old August 11th, 2004, 11:16 PM
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Default Limit rows returned and next rows

I use C#.NET

I have sql statement. This sql statement return too many rows.

The firstly show, I want to show 20 rows on my .aspx web page.

When I click "Next page 20 items" label, then return next 20 items and repeat until no rows.

When I click "Previous page 20 items" then return previous 20 items and repeat until first 20 rows.

How did I do that?

Thank you so much.

Best regards,

Minh Phan.



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Old August 12th, 2004, 06:25 AM
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Default

If you are using datagrid to display the records then Set the Paging & CustomPaging property of the DataGrid to true and pagesize to 20.

See the sample below:

private void Page_Load(object sender, System.EventArgs e)
{ // Put user code to initialize the page here
    if(!IsPostBack){
        BindGrid(0,DataGrid1.PageSize);
    }
}
private void BindGrid(int st,int nt){
    string sqlconn;
    string strSql;
    sqlconn=ConfigurationSettings.AppSettings["conn"];
     SqlConnection conn=new SqlConnection(sqlconn);
    strSql="select job_id,job_desc,min_lvl,max_lvl from jobs where job_id>="+st+" and job_id<="+nt+"";
        SqlDataAdapter strAdap=new SqlDataAdapter(strSql,conn);
    DataSet ds=new DataSet();
    strAdap.Fill(ds);
    DataGrid1.DataSource=ds;
    DataGrid1.VirtualItemCount=100;
    DataGrid1.DataBind();
}
private void InitializeComponent()
{
    this.DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEvent Handler(this.DataGrid1_PageIndexChanged);
     this.Load += new System.EventHandler(this.Page_Load);
}
private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEvent Args e)
{
   DataGrid1.CurrentPageIndex = e.NewPageIndex;
   BindGrid((e.NewPageIndex *DataGrid1.PageSize)+1,(e.NewPageIndex* DataGrid1.PageSize)+DataGrid1.PageSize);
}


Here BindGrid() function is used to bind the data's to the datagrid and VirtualItemCount property allows the control to determine the total number of pages needed to display every item in the DataGrid control.


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