Grid View Editing

design

 <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4"
                        ForeColor="#333333" GridLines="None" Width="502px"
                        onrowcancelingedit="GridView1_RowCancelingEdit"
                        onrowdatabound="GridView1_RowDataBound" onrowediting="GridView1_RowEditing"
                        onrowupdating="GridView1_RowUpdating"
                        onselectedindexchanged="GridView1_SelectedIndexChanged"
                        style="text-align: center" DataKeyNames="u_id">
                        <AlternatingRowStyle BackColor="White" />
                        <Columns>
                            <asp:TemplateField HeaderText="Name">
                                <EditItemTemplate>
                                    <asp:TextBox ID="txtname" runat="server" Text='<%# Bind("u_name") %>'></asp:TextBox>
                                </EditItemTemplate>
                                <ItemTemplate>
                                    <asp:Label ID="Label1" runat="server" Text='<%# Bind("u_name") %>'></asp:Label>
                                </ItemTemplate>
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="Gender">
                                <EditItemTemplate>
                                    <asp:RadioButtonList ID="rdbGender" runat="server" RepeatDirection="Horizontal">
                                        <asp:ListItem>Male</asp:ListItem>
                                        <asp:ListItem>Female</asp:ListItem>
                                    </asp:RadioButtonList>
                                    <asp:TextBox ID="txtGender" runat="server" Text='<%# Bind("u_gender") %>' Visible="false"></asp:TextBox>
                                </EditItemTemplate>
                                <ItemTemplate>
                                    <asp:Label ID="Label2" runat="server" Text='<%# Bind("u_gender") %>'></asp:Label>
                                    <asp:RadioButtonList ID="rdbGender" runat="server" RepeatDirection="Horizontal" Visible="false">
                                        <asp:ListItem>Male</asp:ListItem>
                                        <asp:ListItem>Female</asp:ListItem>
                                    </asp:RadioButtonList>
                                </ItemTemplate>
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="Class">
                                <EditItemTemplate>
                                    <asp:DropDownList ID="ddlClass" runat="server" Height="16px" Width="88px"
                                        onselectedindexchanged="ddlClass_SelectedIndexChanged">
                                    </asp:DropDownList>
                                    <asp:TextBox ID="txtClass" runat="server" Text='<%# Bind("c_name") %>' Visible="false"></asp:TextBox>
                                </EditItemTemplate>
                                <ItemTemplate>
                                    <asp:Label ID="Label3" runat="server" Text='<%# Bind("c_name") %>'></asp:Label>
                                    <asp:DropDownList ID="ddlClass" runat="server" Height="16px" Width="88px" Visible="false">
                                    </asp:DropDownList>
                                </ItemTemplate>
                            </asp:TemplateField>
                            <asp:CommandField ShowEditButton="True" />
                            <%--
                            <asp:BoundField DataField="u_name" HeaderText="Name" />

                            <asp:BoundField DataField="u_gender" HeaderText="Gender" />

                            <asp:BoundField DataField="c_name" HeaderText="Class" />

                            <asp:CommandField ShowEditButton="True" />--%>
                        </Columns>
                        <EditRowStyle BackColor="#7C6F57" />
                        <FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
                        <HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
                        <PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />
                        <RowStyle BackColor="#E3EAEB" />
                        <SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
                        <SortedAscendingCellStyle BackColor="#F8FAFA" />
                        <SortedAscendingHeaderStyle BackColor="#246B61" />
                        <SortedDescendingCellStyle BackColor="#D4DFE1" />
                        <SortedDescendingHeaderStyle BackColor="#15524A" />
                    </asp:GridView>


Code

 protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        FillGrid();

    }
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    { if (e.Row.RowType == DataControlRowType.DataRow)
            {
                TextBox txtG = (TextBox)e.Row.FindControl("txtGender");
                RadioButtonList rdb = (RadioButtonList)e.Row.FindControl("rdbGender");
                if (txtG != null)
                {
                    if (txtG.Text == "Male")
                    {
                        rdb.Items[0].Selected = true;

                    }
                    else
                    {
                        rdb.Items[1].Selected = true;
                    }
                }

                DropDownList ddl = (DropDownList)e.Row.FindControl("ddlClass");
                TextBox txtC = (TextBox)e.Row.FindControl("txtClass");
                string str = "select * from tbl_class";
                SqlDataAdapter adt = new SqlDataAdapter(str, con);
                DataTable dt = new DataTable();
                adt.Fill(dt);
                ddl.DataSource = dt;
                ddl.DataTextField = "c_name";
                ddl.DataValueField = "c_id";
                ddl.DataBind();
                if (txtC != null)
                {
                    ddl.SelectedValue = ddl.Items.FindByText(txtC.Text).Value;
                }
            }
     
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        FillGrid();
   
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);
        TextBox txtn = (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtname");
        RadioButtonList rdbg = (RadioButtonList)GridView1.Rows[e.RowIndex].FindControl("rdbGender");
        DropDownList ddl = (DropDownList)GridView1.Rows[e.RowIndex].FindControl("ddlClass");
        string strt = ddl.SelectedValue;
        TextBox txt= (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtname");
        string str = "update tbl_user set u_name='" + txtn.Text + "',u_gender='" + rdbg.SelectedItem + "',u_c_id=" +Convert.ToInt32(strt)   + "where u_id=" + id + "";
        SqlCommand cmd = new SqlCommand(str, con);
        cmd.ExecuteNonQuery();
        GridView1.EditIndex = -1;
 
        FillGrid();
     


    }

Calling javascript function from CodeBehind with C#

Injecting a javascript code into a label control

This is one of the simplest method to call a javascript function from code behind. You need to do the following:

1. Create a new website project
2. Add a label and button control on your Default.aspx page
3. You body part of the markup should now look something like this:
   <body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="lblJavaScript" runat="server" Text=""></asp:Label>
        <asp:Button ID="btnShowDialogue" runat="server" Text="Show Dialogue" />
    </div>
    </form>
</body> 
4. Add a javascript function to show a message box as shown below:
   <head runat="server">
    <title>Calling javascript function from code behind example</title>
        <script type="text/javascript">
            function showDialogue() {
                alert("this dialogue has been invoked through codebehind.");
            }
        </script>
</head>
5. Now double-click on the button and add the following code:
   lblJavaScript.Text = "<script type='text/javascript'>showDialogue();</script>";
6. Run your project and click the Show Dialogue button
7. A message box will be displayed as shown below:
   

Logout or signout problem in asp.net c# using Master page and windows authentication

Login Page

protected void Page_Load(object sender, EventArgs e)
{
    Session["imp"] = "0";            
}

protected void LinkButton1_Click(object sender, EventArgs e)
{
    Session["imp"] = "1";
    Response.Redirect("AdminHome.aspx");
}

Log Out Page

protected void Page_Load(object sender, EventArgs e)
{
    Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1));
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.Cache.SetNoStore();
    if (Session["imp"].ToString() == "1")
    { }
    else
    {
        Response.Redirect("HomePage.aspx");
    }  
}

protected void LinkButton1_Click(object sender, EventArgs e)
{
    Session["imp"] = "0";
    Session.Abandon();
    Response.Clear();
    Response.Redirect("HomePage.aspx");
}

Embedded Code Blocks

An embedded code block is server code that executes during the page's render phase. The code in the block can execute programming statements and call functions in the current page class.

C#

<%@ Page Language="C#" %>
<html>
<body>
    <form id="form1" runat="server">
    <% for(int i = 0; i < 6; i++) %>
       <% { Response.Write("<br>" + i.ToString()); }%>
    </form>
</body>
</html>

C#








<%@ Page Language="C#" %>
<script runat=server>
protected String GetTime()
{
    return DateTime.Now.ToString("t");
}
</script>
<html>
<body>
    <form id="form1" runat="server">
       Current server time is <% =GetTime()%>.
    </form>
</body>
</html>