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ASP.NET query string parameters

I want to pass the checked checkboxes value of my listview control to a second page so I can display the listview in this second page with only those selected records

this is what I am have so far , but dont really know how to get it to work the desire way..

Much help is appreciated!!

Protected Sub ListView1_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ListViewItemEventArgs) Handles ListView1.ItemDataBound

For Each lvi As ListViewItem In ListView1.Items
            Dim chb As CheckBox = DirectCast(lvi.FindControl("CheckBoxPrintProvider"), CheckBox)

            If chb.Checked Then
                Dim param1 As String
                param1 = CType(e.Item.DataItem, System.Data.DataRowView)("ID").ToString()
                ' Find my Print Button in Listview1 
                Dim myButtonPrint As Button = CType(ListView1.FindControl("PrintButton"), Button)
                ' This code sends only one ID in my querystring I need to pass all checkbixes as parameters
                
                myButtonPrint.PostBackUrl = "PrintableProviderList.aspx?Id=" & param1
                'myButtonPrint.PostBackUrl = "PrintableProviderList.aspx?Id=" & CType(e.Item.DataItem, System.Data.DataRowView)("ID").ToString()

            End If

        Next
        
End Sub

Open in new window

aledev

you put all the records id inside a string array and then save this array into the session state object, so when you will load the second page you have only to read, in the code, the session state object with the records previously saved

i hope this code attached will help you

/***** First page code *****/
Protected Sub ListView1_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ListViewItemEventArgs) Handles ListView1.ItemDataBound

For Each lvi As ListViewItem In ListView1.Items
            Dim chb As CheckBox = DirectCast(lvi.FindControl("CheckBoxPrintProvider"), CheckBox)

            // This is the list you will save in Session object
			
			List<string> recordsId=new List<string>();
			
            If chb.Checked Then
                Dim param1 As String
                param1 = CType(e.Item.DataItem, System.Data.DataRowView)("ID").ToString()

				recordsId.Add(param1);
				/* The code below is useless because you don't need to pass parameters anymore */
                ' Find my Print Button in Listview1 
                Dim myButtonPrint As Button = CType(ListView1.FindControl("PrintButton"), Button)
                ' This code sends only one ID in my querystring I need to pass all checkbixes as parameters
                
                myButtonPrint.PostBackUrl = "PrintableProviderList.aspx?Id=" & param1
                'myButtonPrint.PostBackUrl = "PrintableProviderList.aspx?Id=" & CType(e.Item.DataItem, System.Data.DataRowView)("ID").ToString()
				/*----------------------------------------------------*/

				// Now you can save the list
				Session["Records"] = recordsId;
            End If

        Next
        
End Sub


/***** Second page code *****/

protect void Page_Load(object sender, EventArgs e){
	List<string> paramsId = (List<string>)Session["Records"];

	if(null!=paramsId){
		// Put the code for populate the new listview here. Use the list for retrieve the ids
	}
}

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Om Prakash

declare param1 outside the loop and append all checked values to this string.
Dim param1 As String

For Each lvi As ListViewItem In ListView1.Items

next

ans set the param after the loop.
myButtonPrint.PostBackUrl = "PrintableProviderList.aspx?Id=" & param1