Datalist Paging in C Sharp. Help

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C#

public partial class Testimonial : System.Web.UI.Page
    {
     SqlDataAdapter da;
     DataSet ds;
     int pos;
     PagedDataSource pd;
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                this.ViewState["VS"];
                databinds();
            }
            pos = (int)this.ViewState["VS"];
            databinds();
        }
       
        protected void btnfirst_Click(object sender, EventArgs e)
        {
            pos = 0;
            databinds();
        }
        public void databinds()
        {
            da = new SqlDataAdapter();
            ds = new DataSet();
            da.Fill(ds);
            pd.DataSource = ds.Tables[0].DefaultView;
            pd.PageSize = 5;
            pd.AllowPaging = true;
            pd.CurrentPageIndex = pos;
            btnfirst.Enabled = !pd.IsFirstPage;
            btnprevious.Enabled = !pd.IsFirstPage;
            btnlast.Enabled = !pd.IsLastPage;
            btnnext.Enabled = !pd.IsLastPage;
            DataList1.DataSource = pd;
            DataList1.DataBind();

        }
        protected void btnprevious_Click(object sender, EventArgs e)
        {
            pos = (int)this.ViewState["vs"];
            pos -= 1;
            this.ViewState["vs"] = pos;
            databinds();
        }
        protected void btnnext_Click(object sender, EventArgs e)
        {
            pos = (int)this.ViewState["vs"];
            pos += 1;
            this.ViewState["vs"] = pos;
            databinds();
        }
        protected void btnlast_Click(object sender, EventArgs e)
        {

            pos = pd.PageCount - 1;
            databinds();
        }

I have the following error if I use

C#

this.ViewState["VS"];

Error 2 Only assignment, call, increment, decrement, and new object xpressions can be used as a statement
Can someone help me out?
Thanks In Advance

Posted 23-May-12 23:58pm

Arjun YK

Updated 24-May-12 0:14am

member60

v2

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2 solutions

Solution 1

First there is a discrepancy in you're call to the ViewState. I see ViewState["VS"] and ViewState["vs"]
Second calls to LoadViewState and SaveViewState are missing

Posted 24-May-12 0:12am

pietvredeveld

Comments

Arjun YK 24-May-12 6:29am

Thanks For It but should I use view state there?

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Arjun YK · Accepted Answer · 2012-05-29T23:14:00

C#

    namespace PagininDataList
    {
        public partial class DisplayTestimonials : System.Web.UI.Page
        {
            SqlDataAdapter dadapter;
            DataSet dset;
            PagedDataSource adsource;
            string connstring = "Data Source = .; Initial Catalog = medicalvoyager; Integrated Security = true";
            int pos;
            protected void Page_Load(object sender, EventArgs e)
            {
                if (!IsPostBack)
                {
                    ViewState["vs"] = 0;
                }
                pos = (int)this.ViewState["vs"];
                databind();
            }
            public void databind()
            {
                dadapter = new SqlDataAdapter("select * from testimonial", connstring);
                dset = new DataSet();
                adsource = new PagedDataSource();
                dadapter.Fill(dset);
                adsource.DataSource = dset.Tables[0].DefaultView;
                adsource.PageSize = 3;
                adsource.AllowPaging = true;
                adsource.CurrentPageIndex = pos;
                btnfirst.Enabled = !adsource.IsFirstPage;
                btnprevious.Enabled = !adsource.IsFirstPage;
                btnlast.Enabled = !adsource.IsLastPage;
                btnnext.Enabled = !adsource.IsLastPage;
                DataList1.DataSource = adsource;
                DataList1.DataBind();
            }

            protected void btnfirst_Click(object sender, EventArgs e)
            {
                pos = 0;
                databind();
            }

            protected void btnprevious_Click(object sender, EventArgs e)
            {
                pos = (int)this.ViewState["vs"];
                pos -= 1;
                this.ViewState["vs"] = pos;
                databind();
            }

            protected void btnnext_Click(object sender, EventArgs e)
            {
                pos = (int)this.ViewState["vs"];
                pos += 1;
                this.ViewState["vs"] = pos;
                databind();

            }

            protected void btnlast_Click(object sender, EventArgs e)
            {
                pos = adsource.PageCount - 1;
                databind();
            }
        }
    }
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