delete a row using view state variable its not working

Question

//client side

<asp:UpdatePanel ID="UpdatePanel1" ViewStateMode="Enabled" UpdateMode="Always" runat="server">

<ContentTemplate>

<asp:GridView ID="gvResumeManage" Width="1050px" CssClass="GetGrid" runat="server" BackColor="White" OnRowCommand="OnRowCommand" AutoGenerateColumns="false"

GridLines="none" CellPadding="5" PageSize="15" AllowPaging="true">

<Columns>

<asp:TemplateField HeaderText = "S.N" ItemStyle-Width="70">

<ItemTemplate>

<asp:Label ID="lblRowNumber" Text='<%# Container.DataItemIndex + 1 %>' runat="server" />

</ItemTemplate>

</asp:TemplateField>

<asp:BoundField DataField="ResumeUserId" ItemStyle-Width="120" HeaderText="Id" />

<asp:BoundField DataField="ResumeName" ItemStyle-Width="220" HeaderText="Name" />

<asp:BoundField DataField="ResumeEmail" ItemStyle-Width="130" HeaderText="Email" />

<asp:BoundField DataField="ResumeContact" ItemStyle-Width="80" HeaderText="Contact" />

<asp:BoundField DataField="ResumeDate" ItemStyle-Width="130" HeaderText="Time" />

<asp:TemplateField ItemStyle-Width="80" HeaderText="Manage">

<ItemTemplate>

<asp:Button ID="btndelete" CssClass="delete" CommandName="delete" CommandArgument='<%# Eval("ResumeId") %>' ToolTip="Delete" runat="server" Text="" />

<asp:Button ID="btndownload" CssClass="view" CommandName="download" CommandArgument='<%# Eval("ResumeFileName") %>' ToolTip="Download" runat="server" Text="" />

</ItemTemplate>

</asp:TemplateField>

</Columns>

<HeaderStyle CssClass="GridHeader" />

<AlternatingRowStyle BackColor="#f1f1f1"/>

<PagerStyle CssClass="GridPager" />

</asp:GridView>

</ContentTemplate>

</asp:UpdatePanel>

 

 

 

 

 

 

//server side 

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

DataTable dt = new DataTable();

myConn.Open();

SqlCommand cmd = myConn.CreateCommand();

cmd.CommandType = CommandType.StoredProcedure;

cmd.CommandText = "tblResumeUploadABind";

SqlDataAdapter sda = new SqlDataAdapter();

sda.SelectCommand = cmd;

sda.Fill(dt);

ViewState["resume"] = dt;

gvResumeManage.DataSource = dt;

gvResumeManage.DataBind();

}

}

 

 

protected void OnRowCommand(object sender, GridViewCommandEventArgs e)

{

DataTable dtt = (DataTable)ViewState["resume"];

if (e.CommandName == "delete")

{

GridViewRow row = (GridViewRow)(((Control)e.CommandSource).NamingContainer);

int RowIndex = row.RowIndex;

int id = Convert.ToInt32(e.CommandArgument);

if (ViewState["resume"] != null)

{

myConn.Open();

SqlCommand cmd = myConn.CreateCommand();

cmd.CommandType = CommandType.StoredProcedure;

cmd.CommandText = "tblResumeUploadADelete";

cmd.Parameters.Add(new SqlParameter("@id", Convert.ToString(id)));

cmd.ExecuteNonQuery();

myConn.Close();

dtt = (DataTable)ViewState["resume"];

dtt.Rows.Remove(dtt.Rows[RowIndex]);

gvResumeManage.DataSource = dtt;

gvResumeManage.DataBind();

ViewState["resume"] = dtt;

}

}

}