Gridview in checkbox after lost value

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Hi I am using Product Table. I choise Category DropDownList after page is postback and I choise checkbox and I choise another DropdownList after page is postback and I lost value Checkbox Checked. How can I do example.

What I have tried:

ASP.NET

<asp:GridView ID="example" CssClass="table table-striped table-bordered table-hover" AutoGenerateColumns="false" runat="server" ClientIDMode="Static" OnPreRender="example_PreRender" OnRowEditing="example_RowEditing" OnRowCancelingEdit="example_RowCancelingEdit" OnRowDeleting="example_RowDeleting" OnRowDataBound="example_RowDataBound">

<columns>

    <asp:TemplateField HeaderText="Ürün Seç" ItemStyle-Width="50">
        <HeaderTemplate>
            <asp:CheckBox ID="chkAll" runat="server" onclick="checkAll(this);" />
        </HeaderTemplate>
        <itemtemplate>
            <asp:CheckBox ID="chcsec" CssClass="form-control" runat="server" onclick="Check_Click(this);" />



    <asp:TemplateField HeaderText="Ürün Ad" ItemStyle-Width="100">
        <itemtemplate>
            <asp:Label ID="lblUrun" runat="server" Text='<%# Eval("UrunAd") %>'>

        <edititemtemplate>
            <asp:TextBox ID="txturunad" runat="server" Text='<%# Eval("UrunAd") %>'>




    <asp:TemplateField HeaderText="Stok" ItemStyle-Width="50">
        <itemtemplate>
            <asp:Label ID="lblStok" Style="padding: 3px 5px;" runat="server" Text='<%# Eval("Stok") %>'>

        <edititemtemplate>
            <asp:TextBox ID="txtstok" Style="padding: 3px 5px;" runat="server" Text='<%# Eval("Stok") %>'>



    <asp:TemplateField HeaderText="Fiyat" ItemStyle-Width="50">
        <itemtemplate>
            <asp:Label ID="txtfiyat" Style="padding: 3px 5px;" CssClass="form-control" runat="server">

        <edititemtemplate>
            <asp:TextBox ID="txtfiyat" Style="padding: 3px 5px;" runat="server" CssClass="form-control">



    <asp:TemplateField HeaderText="Adet" ItemStyle-Width="50">
        <itemtemplate>
            <asp:Label ID="txtAdet" Style="padding: 3px 5px;" CssClass="form-control" runat="server">

        <edititemtemplate>
            <asp:TextBox ID="txtAdet" runat="server" Style="padding: 3px 5px;" CssClass="form-control">





    <asp:TemplateField HeaderText="Eleman Seç" ItemStyle-Width="100">

        <itemtemplate>
            <asp:DropDownList ID="drpEleman" CssClass="form-control" runat="server">





    <asp:TemplateField HeaderText="Eleman Adet" ItemStyle-Width="50">
        <itemtemplate>
            <asp:Label ID="txtElemanAdet" Style="padding: 3px 5px;" CssClass="form-control" runat="server">

        <edititemtemplate>
            <asp:TextBox ID="txtElemanAdet" runat="server" Style="padding: 3px 5px;" CssClass="form-control">



    <asp:TemplateField HeaderText="Eleman Fiyat" ItemStyle-Width="50">
        <itemtemplate>
            <asp:Label ID="txtElemanFiyat" Style="padding: 3px 5px;" CssClass="form-control" runat="server">

        <edititemtemplate>
            <asp:TextBox ID="txtElemanFiyat" runat="server" Style="padding: 3px 5px;" CssClass="form-control">




    <asp:CommandField ButtonType="Link" ShowEditButton="true" ShowDeleteButton="true" ItemStyle-Width="150" />

Posted 19-Nov-16 10:22am

Member 12859772

Updated 21-Nov-16 3:02am

Patrice T

v3

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Suvendu Shekhar Giri 19-Nov-16 21:58pm

Well, so what is your question?

Member 12859772 20-Nov-16 2:57am

You dont understand me? I am using Gridview and in checkbox. When I checked Checkbox after postback lost Checkbox Value. I want to do if checkbox checked keep value.

3 solutions

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2016-11-19T19:22:00

Solution 1

You have to store the checkbox indexes or something to recognize them somewhere may be in a Session or ViewState property. While loading the grid, inside RowDatabound, you can check that checkbox if it is present in the session, simple.

Posted 19-Nov-16 19:22pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

Member 12859772 20-Nov-16 2:54am

How can I do. I am using GridView.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 21-Nov-16 1:10am

Check the following.

1. http://www.aspdotnet-suresh.com/2010/04/maintaining-state-of-checkboxes-while.html
2. http://stackoverflow.com/a/24734684/1099247

Vincent Maverick Durano · Answer 2 · 2016-11-20T21:50:00

Solution 2

I agree with the member above, that's the nature of the web. Web Apps are stateless and you have to do something to persist the state of the CheckBox that resides in a normal grid or paged grid. You'll have to track the selected page and the CheckBox that was selected and store it somewhere like ViewState/Session so that you can reference them back when it postbacks. Here's one example that you can refer: Preserving state of Checkboxes while paging in ASP.Net GridView Control[^]

Posted 20-Nov-16 21:50pm

Vincent Maverick Durano

Comments

Member 12859772 21-Nov-16 6:13am

is that true that code?

Vincent Maverick Durano 21-Nov-16 7:47am

what do you mean?

Member 12859772 21-Nov-16 8:14am

My code is true? I asked.

Vincent Maverick Durano 21-Nov-16 8:16am

Which code? If you mean your solution, then yes. You need to use Session/ViewState to reference the selected CheckBox state across postbacks.

Member 12859772 21-Nov-16 8:34am

But I have problem. I have two Category and according to Products. When I selected First category and selected two Product checkbox. After I selected second category. I selected one product. After I want to do selected checkboxes Total price. When I click Total Button Only total 2 checkbox. So I selected 3 checkbox. How can I do.

Vincent Maverick Durano 21-Nov-16 8:45am

Post it as a separate thread so answers on this thread will not be mixed.

Member 12859772 21-Nov-16 8:57am

What can I do another open question?

Vincent Maverick Durano 21-Nov-16 9:00am

yes, and make sure to put a link of this thread to your new thread.

Member 12859772 21-Nov-16 9:05am

I open. http://www.codeproject.com/Questions/1157025/Gridview-in-checkbox-after-lost-value

Vincent Maverick Durano 21-Nov-16 9:19am

Thank you. You may now close this thread and focus on your new thread.

Member 12859772 21-Nov-16 9:29am

But another post deleted. This post will. Can you help me this post?

Member 12859772 · Answer 3 · 2016-11-21T03:02:00

<asp:gridview id="example" cssclass="table table-striped table-bordered table-hover" autogeneratecolumns="false" datakeynames="ID" runat="server" clientidmode="Static" onprerender="example_PreRender" onrowediting="example_RowEditing" onrowcancelingedit="example_RowCancelingEdit" onrowdeleting="example_RowDeleting" onrowdatabound="example_RowDataBound" ondatabound="example_DataBound">

                                            <columns>

                                                <asp:templatefield headertext="Ürün Seç" itemstyle-width="50">

                                                    <itemtemplate>
                                                       
                                                            <asp:checkbox id="chcsec" cssclass="form-control" runat="server" autopostback="true">


                                                      
                                                    </asp:checkbox></itemtemplate>
                                                </asp:templatefield>

                                                <asp:templatefield headertext="Ürün Ad" itemstyle-width="100">
                                                    <itemtemplate>
                                                        <asp:label id="lblUrun" runat="server" text="<%# Eval("UrunAd") %>"></asp:label>
                                                    </itemtemplate>
                                                    <edititemtemplate>
                                                        <asp:textbox id="txturunad" runat="server" text="<%# Eval("UrunAd") %>"></asp:textbox>
                                                    </edititemtemplate>
                                                </asp:templatefield>


                                                <asp:templatefield headertext="Stok" itemstyle-width="50">
                                                    <itemtemplate>
                                                        <asp:label id="lblStok" style="padding: 3px 5px;" runat="server" text="<%# Eval("Stok") %>"></asp:label>
                                                    </itemtemplate>
                                                    <edititemtemplate>
                                                        <asp:textbox id="txtstok" style="padding: 3px 5px;" runat="server" text="<%# Eval("Stok") %>"></asp:textbox>
                                                    </edititemtemplate>
                                                </asp:templatefield>

                                                <asp:templatefield headertext="Fiyat" itemstyle-width="50">
                                                    <itemtemplate>
                                                        <asp:label id="txtfiyat" style="padding: 3px 5px;" cssclass="form-control" runat="server">500</asp:label>
                                                    </itemtemplate>
                                                    <edititemtemplate>
                                                        <asp:textbox id="txtfiyat" style="padding: 3px 5px;" runat="server" cssclass="form-control"></asp:textbox>
                                                    </edititemtemplate>
                                                </asp:templatefield>

                                                <asp:templatefield headertext="Adet" itemstyle-width="50">
                                                   <itemtemplate>
                                                        <asp:label id="txtAdet" style="padding: 3px 5px;" cssclass="form-control" runat="server"></asp:label>
                                                    </itemtemplate>
                                                    <edititemtemplate>
                                                        <asp:textbox id="txtAdet" runat="server" style="padding: 3px 5px;" cssclass="form-control"></asp:textbox>
                                                    </edititemtemplate>
                                                </asp:templatefield>



                                                <asp:templatefield headertext="Eleman Seç" itemstyle-width="100">

                                                    <itemtemplate>
                                                        <asp:dropdownlist id="drpEleman" cssclass="form-control" runat="server"></asp:dropdownlist>
                                                    </itemtemplate>


                                                </asp:templatefield>

                                                <asp:templatefield headertext="Eleman Adet" itemstyle-width="50">
                                                    <itemtemplate>
                                                        <asp:label id="txtElemanAdet" style="padding: 3px 5px;" cssclass="form-control" runat="server"></asp:label>
                                                    </itemtemplate>
                                                    <edititemtemplate>
                                                        <asp:textbox id="txtElemanAdet" runat="server" style="padding: 3px 5px;" cssclass="form-control"></asp:textbox>
                                                    </edititemtemplate>
                                                </asp:templatefield>

                                                <asp:templatefield headertext="Eleman Fiyat" itemstyle-width="50">
                                                    <itemtemplate>
                                                        <asp:label id="txtElemanFiyat" style="padding: 3px 5px;" cssclass="form-control" runat="server"></asp:label>
                                                    </itemtemplate>
                                                    <edititemtemplate>
                                                        <asp:textbox id="txtElemanFiyat" runat="server" style="padding: 3px 5px;" cssclass="form-control"></asp:textbox>
                                                    </edititemtemplate>
                                                </asp:templatefield>

                                         

                                                <asp:commandfield buttontype="Link" showeditbutton="true" showdeletebutton="true" itemstyle-width="150">
                                            </asp:commandfield></columns>

                                        </asp:gridview>

------------------------------------------------------------------------------------

if (!Page.IsPostBack)
          {
              //Uruns();
              //Projes();
              //Siparislers();
              Elemans();
              Musteris();
              Kategoris();



          }
          else
          {
              List<object> datakeys = ViewState["datakeys"] != null ?
                          (List<object>)ViewState["datakeys"] : new List<object>();

              foreach (GridViewRow row in example.Rows)
                  if (((CheckBox)row.FindControl("chcsec")).Checked)
                  {
                      datakeys.Add(example.DataKeys[row.RowIndex].Value);
                  }
                  else
                  {
                      datakeys.Remove(example.DataKeys[row.RowIndex].Value);
                  }
              ViewState["datakeys"] = datakeys;
          }

-----------------------------------------------------------

protected void example_DataBound(object sender, EventArgs e)
       {
           //Session.Add("arrcon", arr);

           if (example.Rows.Count > 0 && ViewState["datakeys"] != null)
           {
               List<object> datakeys = (List<object>)ViewState["datakeys"];
               foreach (GridViewRow row in example.Rows)
                   ((CheckBox)row.FindControl("chcsec")).Checked = datakeys.Contains(example.DataKeys[row.RowIndex].Value);
           }
       }

       protected void btnTopla_Click(object sender, EventArgs e)
       {
           if (example.Rows.Count > 0 && ViewState["datakeys"] != null)
           {
               int sonuc = 0;
               List<object> datakeys = (List<object>)ViewState["datakeys"];
               int i = 0;
               foreach (GridViewRow row in example.Rows)
               {
                   ((CheckBox)row.FindControl("chcsec")).Checked = datakeys.Contains(example.DataKeys[row.RowIndex].Value);

                   var lblFiyat = row.FindControl("txtfiyat") as Label;


                   int sayi1 = Convert.ToInt32(lblFiyat.Text);

                   i++;

                   sonuc = sayi1 * i;

               }

               txtToplamfiyat.Text = sonuc.ToString();

           }
       }

Gridview in checkbox after lost value

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