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Hello Friends,
I've a GridView inside a UpdatePanel. And there is a Fileupload control inside the GridView which is fired to Update the existing image with newer one. My code is running perfectly without UpdatePanel. But as i put my GridView inside the UpdatePanel it gives me an error "Object References not set to an instance". I think this error is being generated because of FileUpload control. So i want to have a trigger control of UpdatePanel to upload the new image. How can i bind a trigger control of UpdatePanel at RowUpdating event of GridView at code behind
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If you have to refresh the grid when file upload occurs why do you place the GridView inside the update panel??? 
You can use PostBack trigger to upload files.. 
Check this[^] how they are doing fileupload from within the updatepanel using PostBack Trigger.
![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
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I dont have to refresh the page. I just want to use PostBack trigger. But PostBack trigger needs a ControlID so what will be the ControlID for PostBack Trigger. Because i'm using RowUpdating event of GridView......
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AFAIK... Postback trigger will used to postback the whole page to the server...
The controlId of the PostBack trigger should be the control that should invoke the Postback from within the UpdatePanel.
If you want Button1 which is placed within the UpdatePanel to postback the page, rather than going for partial update, just use ControlID = "Button1" For your help, lets give you a sample code :
<asp:UpdatePanel ID="upTest" ChildrenAsTriggers="False" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<asp:Label ID="lblResults" runat="server"></asp:Label><br /><br />
<asp:Button ID="btnAsync" Text="Asynch Post" runat="server" OnClick="btnAsync_Click" />
<asp:Button ID="btnFullPost" Text="Full Post" runat="server" OnClick="btnFullPost_Click" >
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnAsync" EventName="Click" />
<asp:PostBackTrigger ControlID="btnFullPost" />
</Triggers>
</asp:UpdatePanel>
AsyncPostBackTrigger will postback asynchronously while PostBackTrigger will do this normally...
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I have the same problem can you take a look:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="ctrlUserProfilePics.ascx.cs"
Inherits="OmegaLove.Web.UI.ctrlUserProfilePics" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%--<%@ Register Src="ctrlGPStatusBox.ascx" TagName="ctrlGPStatusBox" TagPrefix="uc1" %>
--%>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<br />
<div id="UploadArea">
<table>
<tr>
<td>
Browse Image:
</td>
<td>
<asp:FileUpload ID="FileUpload1" runat="server" />
</td>
</tr>
</table>
</div>
<p>
<asp:Button ID="UploadButton" runat="server" Text="Upload Now" OnClick="UploadButton_Click" />
</p>
<asp:Label ID="lblResult" runat="server" ForeColor="#0066FF"></asp:Label>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="UploadButton" />
</Triggers>
</asp:UpdatePanel>
<br />
<hr />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="5"
GridLines="None" ShowHeader="False">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:Image ID="imgSaved" runat="server" ImageUrl='<%# imageURL(DataBinder.Eval(Container.DataItem, "img_id").ToString()) %>'
AlternateText='<%#DataBinder.Eval(Container.DataItem,"img_title") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EmptyDataTemplate>
No records found
</EmptyDataTemplate>
</asp:GridView>
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Hi,
My Ms-Access Database is on my website.
ftp//ftp.WebsiteName.com/App_Data/SerialNo.mdb
What will be my connection sting.
Thanks
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You want to have connection to your database using ftp protocol.... ?????
Please download the file to your own location and use it.. Or you can use unc path to the server like \\yourserverip\app_Data\serialNo.mdb
In ftp, you need to create session to pass ftp commands like open, mput, mget etc... Your session will be terminated just like the HTTP session timeouts, if left idle. So I dont think you can work with this directly using this way... 
Just point the file through network path.
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I have a page which has 4 user controls on it.
The problem is : I have a link on this user control and when clicked goes to other page but I dunno how to pass the session variable to the other page from this page containing that uc.
The other page always gets the same values as the session variable doesn't update when user control is clicked for different values.
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Session["SomeKey"] = SomeValue
This doesn't work for you? Perhaps you should show a little of what you are doing.
only two letters away from being an asset
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the session values pass across all pages .
The problem is on this page I have a user control which is a grid with links. when i click on these links i am passed to other pages with different values for different links of the grid.
but the next page gets only those values which are set in the first page where UC is embedded I need to change values in UC.
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I still don't get what the difficulty is. You can't handle the click event in the user control and make the appropriate settings?
only two letters away from being an asset
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he he he!!
sorry mayb i was not clear in my question.
The thing is i was handling the UC [which had a grid with links]events and not UC Clicked event and that has limitations but i got a workaround. Many thanks.
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If you want to set Session variable while clicking link you can do by Session["Key"]=value in the click event.
Can u plz clarify your question so that we can help you?
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Wow, wish I had thought of that 
only two letters away from being an asset
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Hi ,
I store the image in a binary format into THE DATA BASE and while retriving i select byte array from data base noe i am using http handler to display image by giving
image1.imageurl = "ImageHttpHandler.ashx"
how to draw image here again .
Thanks and regards,
Amit Patel
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Amit Patel1985 wrote: image1.imageurl = "ImageHttpHandler.ashx"
What you need, is to point the imageurl to a page which takes an id on the URL, and reads the image associated with that id and returns it instead of a page. Pointing to an ashx isn't going to do anything.
Christian Graus
Driven to the arms of OSX by Vista.
Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.
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how can i use edit update function in detailsview as i use in grid view.plz help me out ......thanks in Advance...........
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.IO;
public partial class Update_Finance_Details_After_Bill : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindData();
}
}
private void BindData()
{
SqlConnection con = new SqlConnection("Data Source=software;Initial Catalog=LHPL_INFO;Integrated Security=True");
SqlDataAdapter da = new SqlDataAdapter("SELECT SL_NO,GRC_No, Name_of_person, Name_Or_Number_Of_Rooms_Occupied , Date, Time, Check_In_No,Sale_Voucher_No,Party_Debit_Voucher_No FROM LHPL", con);
DataTable dt = new DataTable();
da.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
BindData();
}
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView1.EditIndex = -1;
BindData();
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
if (((LinkButton)GridView1.Rows[0].Cells[0].Controls[0]).Text == "Insert")
{
SqlConnection con = new SqlConnection("Data Source=software;Initial Catalog=LHPL_INFO;Integrated Security=True");
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "INSERT INTO LHPL(Party_Debit_Voucher_No) VALUES(@Party_Debit_Voucher_No)";
cmd.Parameters.Add("@Party_Debit_Voucher_No", SqlDbType.VarChar).Value = ((TextBox)GridView1.Rows[0].Cells[2].Controls[0]).Text;
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
else
{
SqlConnection con = new SqlConnection("Data Source=software;Initial Catalog=LHPL_INFO;Integrated Security=True");
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "UPDATE LHPL SET Party_Debit_Voucher_No=@Party_Debit_Voucher_No WHERE SL_NO=@SL_NO";
cmd.Parameters.Add("@Party_Debit_Voucher_No", SqlDbType.VarChar).Value = ((TextBox)GridView1.Rows[e.RowIndex].Cells[2].Controls[0]).Text;
cmd.Parameters.Add("@SL_NO", SqlDbType.Int).Value = Convert.ToInt32(GridView1.Rows[e.RowIndex].Cells[1].Text);
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
GridView1.EditIndex = -1;
BindData();
}
protected void btnAdd_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("Data Source=software;Initial Catalog=LHPL_INFO;Integrated Security=True");
SqlDataAdapter da = new SqlDataAdapter("SELECT SL_NO,Sale_Voucher_No,GRC_No ,Party_Debit_Voucher_NoFROM LHPL", con);
DataTable dt = new DataTable();
da.Fill(dt);
// Here we'll add a blank row to the returned DataTable
DataRow dr = dt.NewRow();
dt.Rows.InsertAt(dr, 0);
//Creating the first row of GridView to be Editable
GridView1.EditIndex = 0;
GridView1.DataSource = dt;
GridView1.DataBind();
//Changing the Text for Inserting a New Record
((LinkButton)GridView1.Rows[0].Cells[0].Controls[0]).Text = "Insert";
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
SqlConnection con = new SqlConnection("Data Source=software;Initial Catalog=LHPL_INFO;Integrated Security=True");
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "DELETE FROM LHPL WHERE SL_NO=@SL_NO";
cmd.Parameters.Add("@SL_NO", SqlDbType.Int).Value = Convert.ToInt32(GridView1.Rows[e.RowIndex].Cells[1].Text);
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
BindData();
}
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
}
protected void TextBox2_TextChanged(object sender, EventArgs e)
{
}
protected void Button3_Click(object sender, EventArgs e)
{
}
protected void Button4_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("Data Source=software;Initial Catalog=LHPL_INFO;Integrated Security=True");
SqlDataAdapter da = new SqlDataAdapter("SELECT SL_NO,GRC_No, Name_of_person, Name_Or_Number_Of_Rooms_Occupied , Date, Time, Check_In_No ,Sale_Voucher_No ,Party_Debit_Voucher_No FROM LHPL where GRC_No ='" + TextBox1.Text + "'", con);
DataTable dt = new DataTable();
da.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void Button2_Click1(object sender, EventArgs e)
{
}
}
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Hi all,
my website has a search function that search youtube videos for the user.its works well in local machine.when i click the button for search after hosting my site, it leads to a security exception
can anybody help me in solving the same
Thanks in Advance
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Hi,
do you get an error message? Or just the security exception?
Regards
Sebastian
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hello every body
iwant to implement acentral web site using asp.net
and other website as client
the central web stores information about the other website in its database
and the client asks central for information about other clients
ineed ajax also to see direct changes in information
if you can help me
i dont know how to communicate betwwn them and if uou can give me a helpful example im learning asp.net nowdays and iwill be thankful if uou help me with the code
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marwa_noor wrote: im learning asp.net nowday
What you want to do is insanely complex if you're a beginner.
You don't need AJAX, that's mad. You probably want to write some webservices that the two sites can consume to talk to each other.
Christian Graus
Driven to the arms of OSX by Vista.
Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.
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Hi,
All our application are developed using en-us culture.
Now I have to provide the multi-language support to our application.
Issue is all the data in out application is displayed from database and it changes frequently, so i cannot use resource files for this.
Can you help me implementing the globalization using database.
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I think this needs a converter that can convert the existing language to another language.
You can use Google translate to do this job, or any other service... 
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Thanks for the reply.
Converting from one language to another is not the Issue.
I want to save/retrieve all the data from SQL Server 2005.
Want to know the best technique to implement globalization using Database, not resource files.
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