how to maintain viewstate of a runtime generated control

[krishnaveer]

Hi guys I am generating a runtime htmltable, there are checkboxes whatever is selected after post back i want to keep this as it is(as before postback) code for generating run time table Dim tr1 As New HtmlTableRow Dim txtbox As New TextBox Dim chkbox As New CheckBox Dim lbl As New Label Dim td1 As New HtmlTableCell Dim td2 As New HtmlTableCell Dim td3 As New HtmlTableCell txtbox.ID = "xyz" & M chkbox.ID = "abc" & M lbl.ID = "ijk" & M lbl.Text = dsFill.Tables(0).Rows(M).Item("size") txtbox.Width = "30" txtbox.Height = "12" lbl.Font.Size = "8" chkbox.Height = "8" lbl.Width = "80" chkbox.ToolTip = "Click here which size you want" txtbox.ToolTip = "Fill required quantity" td1.Controls.Add(lbl) td2.Controls.Add(chkbox) td3.Controls.Add(txtbox) tr1.Cells.Add(td1) tr1.Cells.Add(td2) tr1.Cells.Add(td3) TABLE2.Rows.Add(tr1) what will be solution please suggest me Thanks In Advanced

krishna veer singh

[Chetan visodiya]

Put the above code in page load event and make sure that this code will execute for every request(wheather it is postback or not).

[krishnaveer]

Ya it is on page load but i want to maintain what ever is selected or checked before postback

krishna veer singh

[Milind R Chavan]

Hi When you generate the Html table from codebehind, just put Html table in to session variable and follow code : on class level declare: static bool createAgain = false; in you function : Session["TABLE2"] = TABLE2; createAgain = true; Write following methods to maintain states: protected override void OnPreInit(EventArgs e) { base.OnPreInit(e); Control control = GetPostBackControl(this.Page); if ((control != null) || createAgain) { //should be set before the CreateUserControl method createAgain = true; CreateUserControl(controlID); } } protected Control GetPostBackControl(Page page) { Control control = null; try { string ctrlName = page.Request.Params.Get("__EVENTTARGET"); if (ctrlName != null && ctrlName != String.Empty) { control = page.FindControl(ctrlName); } } return control; } protected void CreateUserControl(string controlID) { // createAgain field is set to true in the OnPreInit method // when the 'Create User Control' button is clicked // the createAgain field is used to check if the // user control is on the page before the call // if so create the control again and add it to the // Control Hierarchy again if (Session.Count > 0) { for (int i = 0; i < Session.Count; i++) { switch (Session[i].ToString()) { case "ASP Control": // Write your control name { //Add control to placeholder or div break; } } } } } } Please modify the code according to your requirment Regards, Milind

[Abhijit Jana]

You have to create the control before PageLoad(). Please read ASP.NET Page life cycle, which will give a clear idea that why we need to do that.

cheers, Abhijit CodeProject MVP

[luckystar09]

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