Hi this is my aspx page loading some values to the user control
protected void Page_Load(object sender, EventArgs e)
{
}
this is the usercontrol where i am loading and sending the values in find click event
protected void BtnFind_Click(object sender, EventArgs e)
{
Usr_BPOP BPOP = (Usr_BPOP)Page.LoadControl("~/Usr_BPOP.ascx");
BPOP.Date = txtDate.Text.Trim();
BPOP.DocNo = txtDocNo.Text.Trim();
BPOP.Code = txtCode.Text.Trim();
BPOP.Name = txtName.Text.Trim();
BPOP.Partcode = txtPartNo.Text.Trim();
if (chkReprint.Checked)
{
BPOP.BtnReprintVisible = true;
BPOP.BtnSaveVisible = false;
}
divControls.Controls.Clear();
PlaceHolder1.Controls.Add(BPOP);
}
this is my Usr_BPOP.ascx:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
btnReprint.Click += new EventHandler(btnReprint_Click);
}
btnReprint.Visible = false;
btnSave.Visible = BtnSaveVisible;
btnReprint.Visible = BtnReprintVisible;
if (btnReprint.Visible == false)
{
btnReprint.Text = "Print";
btnReprint.Visible = true;
}
table = new DataTable();
table.Columns.Add("DocNum", typeof(string));
table.Columns.Add("DocEntry", typeof(string));
table.Columns.Add("LineNum", typeof(string));
table.Columns.Add("PartNo", typeof(string));
table.Columns.Add("ItemDesc", typeof(string));
table.Columns.Add("QTR", typeof(string));
table.Columns.Add("QTP", typeof(string));
table.Columns.Add("Chk", typeof(bool));
table.Columns.Add("BarCode", typeof(string));
Datalayer dl = new Datalayer();
DataTable dttable = new DataTable();
if (!BtnSaveVisible && BtnReprintVisible)
BtnSaveVisible = true;
dttable = dl.GetPOItem(date, docNo, code, name, partcode, BtnReprintVisible, !BtnSaveVisible).Tables[0];
foreach (DataRow dr in dttable.Rows)
{
table.Rows.Add(dr["DocNum"].ToString(), dr["DocEntry"].ToString(), dr["LineNum"].ToString(), dr["PartNo"].ToString(),
dr["ItemDesc"].ToString(), dr["QTR"].ToString(), dr["QTP"].ToString(), Convert.ToBoolean(dr["Chk"]), dr["Barcode"].ToString());
}
if (table != null && table.Rows.Count > 0)
{
grdlistofitems.DataSource = table;
Session["Table"] = table;
grdlistofitems.DataBind();
}
else
{
}
}
this is the reprint button click event when i cilck this event it is not firing:
void btnReprint_Click(object sender, EventArgs e)
{
}
Since you are not setting the ID of the control, it is generated anew every time the control added to the page. The generated ID might not be the same, and therefore the sender of the event cannot be recognized. So first thing you should do is assign an ID explicitly:
Usr_BPOP BPOP = (Usr_BPOP)Page.LoadControl("~/Usr_BPOP.ascx");
BPOP.ID = "SomeID";
Secondly, assignment of the event handler should be done very time the control is created - that is, on every request, does not matter whether this is a postback or not - otherwise ASP.NET will not be able to determine what method should be called when the event is fired:
protected void Page_Load(object sender, EventArgs e)
{
// No check for postback here
btnReprint.Click += new EventHandler(btnReprint_Click);
Update. There is one more reason why this code does not behave as expected. The BPOP control is added to the page only on btnFind click. When the postback is caused by anything else, including btnReprint, on the response page generation BPOP control is not added to the page at all. If there is no control on the page - obviously its methods, including event handlers, cannot be triggered.
Here is quick and dirty fix for this situation. It should be applied to the page code where BPOP control is added:
protected void Page_Load(object sender, EventArgs e)
{
bool? addBPOP = ViewState["AddBPOP"] as bool?;
if (addBPOP.HasValue && addBPOP.Value)
{
AddBPOP();
}
}
protected void BtnFind_Click(object sender, EventArgs e)
{
AddBPOP();
ViewState["AddBPOP"] = true;
}
protected void AddBPOP()
{
Usr_BPOP BPOP = (Usr_BPOP)Page.LoadControl("~/Usr_BPOP.ascx");
BPOP.ID = "BPOPID";
BPOP.Date = txtDate.Text.Trim();
BPOP.DocNo = txtDocNo.Text.Trim();
BPOP.Code = txtCode.Text.Trim();
BPOP.Name = txtName.Text.Trim();
BPOP.Partcode = txtPartNo.Text.Trim();
if (chkReprint.Checked)
{
BPOP.BtnReprintVisible = true;
BPOP.BtnSaveVisible = false;
}
divControls.Controls.Clear();
PlaceHolder1.Controls.Add(BPOP);
}
Change:
void btnReprint_Click(object sender, EventArgs e)
{
}
To
protected void btnReprint_Click(object sender, EventArgs e)
{
}
Related
I am inserting some content in database on button click event every thing is working fine while insertion of the Data.
The problem is I just refreshed the page after the button click then I noticed that after the button click Data is inserting as many time as I refreshes the page.
How can I stop this ?
Here is my Button Code :
protected void btn_AddEdu_Click(object sender, EventArgs e)
{
hfTab.Value = "edu";
if (ValidateAddEdu())
{
emp_edu.InsertEdu(Session["empcd"].ToString(), ddl_degree.SelectedValue.ToString(), txt_eduterms.Text, ddl_institute.SelectedValue.ToString(), txt_edupassyear.Text, txt_edugrade.Text, ddl_sponsor.SelectedValue.ToString());
int imagefilelength = fileupload_edu.PostedFile.ContentLength;
byte[] imgarray = new byte[imagefilelength];
HttpPostedFile image = fileupload_edu.PostedFile;
image.InputStream.Read(imgarray, 0, imagefilelength);
edu_attach.InsertEduAttachment(Session["empcd"].ToString(),ddl_degree.SelectedValue.ToString(),imgarray);
lbl_eduerr.Text = "Added";
lbl_eduerr.ForeColor = System.Drawing.Color.Green;
BindEduGrid();
}
}
Add following code in your .cs page
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
Session["CheckRefresh"] = Server.UrlDecode(System.DateTime.Now.ToString());
}
}
protected void Page_PreRender(object sender, EventArgs e)
{
ViewState["CheckRefresh"] = Session["CheckRefresh"];
}
protected void btn_AddEdu_Click(object sender, EventArgs e)
{
if (Session["CheckRefresh"].ToString() == ViewState["CheckRefresh"].ToString())
{
hfTab.Value = "edu";
if (ValidateAddEdu())
{
emp_edu.InsertEdu(Session["empcd"].ToString(), ddl_degree.SelectedValue.ToString(), txt_eduterms.Text, ddl_institute.SelectedValue.ToString(), txt_edupassyear.Text, txt_edugrade.Text, ddl_sponsor.SelectedValue.ToString());
int imagefilelength = fileupload_edu.PostedFile.ContentLength;
byte[] imgarray = new byte[imagefilelength];
HttpPostedFile image = fileupload_edu.PostedFile;
image.InputStream.Read(imgarray, 0, imagefilelength);
edu_attach.InsertEduAttachment(Session["empcd"].ToString(),ddl_degree.SelectedValue.ToString(),imgarray);
lbl_eduerr.Text = "Added";
//Add this line
Session["CheckRefresh"] = Server.UrlDecode(System.DateTime.Now.ToString());
lbl_eduerr.ForeColor = System.Drawing.Color.Green;
BindEduGrid();
}
}
}
I have the following code:
protected void Page_Load(object sender, EventArgs e)
{
using (ImageButton _btnRemoveEmpleado = new ImageButton())
{
_btnRemoveEmpleado.ID = "btnOffice_1";
_btnRemoveEmpleado.CommandArgument = Guid.NewGuid().ToString();
_btnRemoveEmpleado.Height = 15;
_btnRemoveEmpleado.Width = 15;
_btnRemoveEmpleado.ImageUrl = "cross-icon.png";
_btnRemoveEmpleado.Click += new ImageClickEventHandler(_btnRemoveEmpleado_Click);
this.phPartesPersonal.Controls.Add(_btnRemoveEmpleado);
}
}
void _btnRemoveEmpleado_Click(object sender, ImageClickEventArgs e)
{
try
{
string s = "";
}
catch (Exception ex)
{
}
finally { }
}
When I click on _btnRemoveEmpleado, the postback is executed but I never reach the string s = ""; line. How could I execute the _btnRemoveEmpleado_Click code, please?
Remove the using, controls are disposed automatically by ASP.NET, they have to live until the end of the page's lifecycle. Apart from that create your dynamic control in Page_Init, then it should work.
protected void Page_Init(object sender, EventArgs e)
{
ImageButton _btnRemoveEmpleado = new ImageButton();
_btnRemoveEmpleado.ID = "btnOffice_1";
_btnRemoveEmpleado.CommandArgument = Guid.NewGuid().ToString();
_btnRemoveEmpleado.Height = 15;
_btnRemoveEmpleado.Width = 15;
_btnRemoveEmpleado.ImageUrl = "cross-icon.png";
_btnRemoveEmpleado.Click += new ImageClickEventHandler(_btnRemoveEmpleado_Click);
this.phPartesPersonal.Controls.Add(_btnRemoveEmpleado);
}
First time poster, long time lurker. I am having some trouble with my ASP.NET page, and I hope someone can help me resolve my issue.
Basically, I have a bunch of checkboxes in a gridview, and two buttons: a 'find' button, and a 'save' button. The 'find' can set the value of the checkbox, but if a user unchecks it, I want to capture that change when the user hits 'save'. Currently, it does not work.
Relevant ASPX:
<%# Page Language="C#" AutoEventWireup="true" EnableViewState="true" CodeBehind="FindTransactions.aspx.cs" Inherits="Basic.FindTransactions" MasterPageFile="~/Trans.Master" %>
Relevant Code Behind here:
Page:
public partial class FindTransactions : System.Web.UI.Page
{
GridView _gridview = new GridView() { ID = "_gridView" };
DataTable _datatable = new DataTable();
Int32 _buyerID = new Int32();
protected void Page_Load(object sender, EventArgs e)
{
}
"Find" button:
protected void Find_Click(object sender, EventArgs e)
{
//truncated
_datatable.Rows.Add(
//filled with other data from a custom object.
);
ViewState["_datatable"] = _datatable;
ViewState["_buyerID"] = _buyerID;
BuildGridView((DataTable)ViewState["_datatable"],(Int32)ViewState["buyerID"]);
}
BuildGridView function:
protected void BuildGridView(DataTable d, Int32 b)
{
_gridview.DataKeyNames = new String[] {"Transaction ID"};
_gridview.AutoGenerateColumns = false;
_gridview.RowDataBound += new GridViewRowEventHandler(OnRowDataBound);
for(Int32 i = 0; i < d.Columns.Count; i++)
{
Boundfield boundfield = new BoundField();
boundfield.DataField = d.Columns[i].ColumnName.ToString();
boundfield.HeaderText = d.Columns[i].ColumnName.ToString();
_gridview.Columns.Add(boundfield);
}
_gridview.DataSource = d;
_gridview.DataBind();
//truncated
Panel1.Controls.Add(_gridview);
}
Row Bound Event handler:
protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
String controlID = "checkBox";
CheckBox c = new CheckBox() { ID = controlID};
c.Enabled = true;
Boolean success;
Boolean v;
success = Boolean.TryParse(e.Row.Cells[8].Text, out v);
e.Row.Cells[8].Controls.Add(c);
if (success)
{
c.Checked = v;
if (c.Checked)
{
//Will uncomment once other things work
//e.Row.Visible = false;
}
}
else
{
c.Checked = false;
}
}
}
All of that works. Here is where it starts to break down:
"Save" button:
protected void Save_Click(object sender, EventArgs e)
{
//Both for troubleshooting and both return 0. (Expected for datatable)
Label1.Text = _gridview.Rows.Count.ToString();
Label2.Text = _datatable.Rows.Count.ToString();
/*truncated
*/
if (grid.Rows.Count == 0)
{
BuildGridView((DataTable)ViewState["infoTable"], (Int32)ViewState["guestID"]);
}
foreach (GridViewRow r in grid.Rows)
{
if (r.RowType == DataControlRowType.DataRow)
{
CheckBox cb = (CheckBox)r.FindControl("checkBox");
if (cb != null && cb.Checked)
{
//This never seems to modify the label.
//Will put code to modify database here.
Label2.Text += "Hi " + r.RowIndex.ToString();
}
}
}
}
After I hit the save button, PostBack occurs and GridView is empty (Rows.Count is 0). ViewState appears to be lost before I get a chance to loop through the GridView rows to determine the checkbox values.
At the end of it all, I just want to capture the status of those checkboxes, changed by user interaction or not, by hitting the 'Save' button.
I found some other articles, but a lot of them haven't worked when I tried implementing the various fixes.
This one seems to be the closest that describes my issue, and the code is structured similarly, but I don't quite understand how to implement the fix: GridView doesn't remember state between postbacks
[New simplified code to illustrate problem:]
namespace GridViewIssue
{
public partial class GridViewNoMaster : System.Web.UI.Page
{
GridView _gridView = new GridView() { ID = "_gridView" };
DataTable _dataTable = new DataTable();
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Find_Click(object sender, EventArgs e)
{
BuildDataTable();
List<String> list = new List<String>();
list.Add("1");
list.Add("User");
list.Add("10/12/2014");
foreach (String s in list)
{
_dataTable.Rows.Add(
list[0],
list[1],
list[2]
);
}
BuildGridView();
//Feedback.Text = _gridView.Rows.Count.ToString();
}
protected void Save_Click(object sender, EventArgs e)
{
Feedback.Text = "Save Clicked, PostBack: " + IsPostBack + ", GridView Row Count: " + _gridView.Rows.Count + ", GridView ViewState: " + _gridView.EnableViewState;
foreach (GridViewRow r in _gridView.Rows)
{
if(r.RowType == DataControlRowType.DataRow)
{
Feedback.Text = "In DataRow type" + _gridView.Rows.Count;
}
}
}
protected void BuildDataTable()
{
_dataTable.Columns.Add("Transaction ID", typeof(String));
_dataTable.Columns.Add("Name", typeof(String));
_dataTable.Columns.Add("Date", typeof(String));
}
protected void BuildGridView()
{
for (Int32 i = 0; i < _dataTable.Columns.Count; i++)
{
BoundField b = new BoundField();
b.DataField = _dataTable.Columns[i].ColumnName.ToString();
b.HeaderText = _dataTable.Columns[i].ColumnName.ToString();
_gridView.Columns.Add(b);
}
_gridView.DataKeyNames = new String[] { "Transaction ID" };
_gridView.AutoGenerateColumns = false;
_gridView.DataSource = _dataTable;
_gridView.DataBind();
Panel1.Controls.Add(_gridView);
}
}
}
I followed this tutorial on MSDN for ASP.NET GridView Update Row, but it does not work.
updatedItem.DepartureCity = ((TextBox)(row.Cells[2].Controls[0])).Text;
Still gives the original value from the cell and not the updated one.
public partial class ManagePage : System.Web.UI.Page
{
BusScheduleModelContainer modelContainer = new BusScheduleModelContainer();
protected void Page_Load(object sender, EventArgs e)
{
//FormsAuthentication.RedirectFromLoginPage()
//if (!HttpContext.Current.User.Identity.IsAuthenticated)
//{
// Server.Transfer("LoginPage.aspx");
//}
resultsGridView.DataSource = modelContainer.BusRoutes.ToList();
resultsGridView.DataBind();
}
protected void RowDeleting(object sender, GridViewDeleteEventArgs e)
{
var routeID = int.Parse(e.Values[0].ToString());
var removedItem = modelContainer.BusRoutes.FirstOrDefault(
item => item.RouteID == routeID);
if (removedItem != null)
{
modelContainer.BusRoutes.Remove(removedItem);
resultsGridView.DataSource = modelContainer.BusRoutes.ToList();
resultsGridView.DataBind();
modelContainer.SaveChanges();
}
}
protected void RowUpdating(object sender, GridViewUpdateEventArgs e)
{
var routeID = int.Parse(e.NewValues[0].ToString());
var updatedItem = modelContainer.BusRoutes.FirstOrDefault(
item => item.RouteID == routeID);
if (updatedItem != null)
{
GridViewRow row = resultsGridView.Rows[e.RowIndex];
var res = row.FindControl("ctl00$ContentPlaceHolder1$resultsGridView$ctl02$ctl03");
updatedItem.DepartureCity = ((TextBox)(row.Cells[2].Controls[0])).Text;
updatedItem.ArrivalCity = ((TextBox)(row.Cells[3].Controls[0])).Text;
updatedItem.DepartureTime = DateTime.Parse(((TextBox)(row.Cells[4].Controls[0])).Text);
updatedItem.ArrivalTime = DateTime.Parse(((TextBox)(row.Cells[5].Controls[0])).Text);
}
resultsGridView.EditIndex = -1;
BindData();
}
protected void RowEditing(object sender, GridViewEditEventArgs e)
{
//Set the edit index.
resultsGridView.EditIndex = e.NewEditIndex;
//Bind data to the GridView control.
BindData();
}
protected void RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
//Reset the edit index.
resultsGridView.EditIndex = -1;
//Bind data to the GridView control.
BindData();
}
private void BindData()
{
resultsGridView.DataSource = modelContainer.BusRoutes.ToList();
resultsGridView.DataBind();
}
}
<div>
<asp:GridView runat="server" ID="resultsGridView"
AutoGenerateColumns="true" AllowPaging="true"
AutoGenerateDeleteButton="true" OnRowDeleting="RowDeleting"
AutoGenerateEditButton="true" OnRowUpdating="RowUpdating"
OnRowEditing="RowEditing" OnRowCancelingEdit="RowCancelingEdit">
</asp:GridView>
</div>
Do you use CommandField for update controler?
If so, when you click update button, first it will do Page_Load event handler, after that do the implementation in RowUpdating event handler.
You should try to check post back in Page_Load event handler like this:
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
resultsGridView.DataSource = modelContainer.BusRoutes.ToList();
resultsGridView.DataBind();
}
}
By this way, it will bind data to the GridView only first time you open this page.
For post back event such as clicking update button, it will not bind the original data to GridView again.
In RowUpdating method you need to add modelContainer.SaveChanges(); like below:
if (updatedItem != null)
{
GridViewRow row = resultsGridView.Rows[e.RowIndex];
var res = row.FindControl("ctl00$ContentPlaceHolder1$resultsGridView$ctl02$ctl03");
updatedItem.DepartureCity = ((TextBox)(row.Cells[2].Controls[0])).Text;
updatedItem.ArrivalCity = ((TextBox)(row.Cells[3].Controls[0])).Text;
updatedItem.DepartureTime = DateTime.Parse(((TextBox)(row.Cells[4].Controls[0])).Text);
updatedItem.ArrivalTime = DateTime.Parse(((TextBox)(row.Cells[5].Controls[0])).Text);
modelContainer.SaveChanges();
}
I need to dynamically add CheckBoxList on the SelectedIndexChanged event of DropDownList. I have achieved this but I cannot retain its value on postback.
Here’s what I have done so far:
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
loadTracks();//Needs to generated dynamically
}
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
loadDegrees();
}
loadTracks();
}
public void loadTracks()
{
try
{
ConfigurationDB objConfig = new ConfigurationDB();
DataSet ds = objConfig.GetTracksByDegreeID(
Convert.ToInt32(ddlDegree.SelectedValue.ToString()));
CheckBoxList CbxList = new CheckBoxList();
CbxList.ID = "Cbx";
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
CbxList.Items.Add(new ListItem(ds.Tables[0].Rows[i]["Track_Name"]
.ToString(), ds.Tables[0].Rows[i]["ID"].ToString()));
}
ph.Controls.Add(CbxList);
ViewState["tracks"] = true;
}
catch(Exception ex)
{
Response.Write(ex.Message);
}
}
//For testing, I added a button and on its click I have added this code
protected void btnDetails_Click(object sender, EventArgs e)
{
CheckBoxList Cbx = (CheckBoxList)ph.FindControl("chk");
foreach (ListItem ex in Cbx.Items)
{
if (ex.Selected)
{
Response.Write(String.Format("You selected: <i>{0}</i> <br>", ex.Value));
}
}
}
Might be a typo:
CbxList.ID = "Cbx";
v.s.
CheckBoxList Cbx = (CheckBoxList)ph.FindControl("chk");
You can try it without changing the code and use pre PreRender
just run you loadTracks()