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ASP.Net object reference error when writing data to xml file via Gridview Empty data template
The issue is when you have the xml file without 'po' node. You can move the node to a new method like: Private Function CreatePOSDataset() As DataSet Dim oDs As New DataSet() oDs.DataSetName = "newshipmentnotification" oDs.Tables.Add("pos") oDs.Tables("pos").Columns.Add("pos_Id") oDs.Tables("pos").Columns("pos_Id").ColumnMapping = MappingType.Hidden oDs.Tables.Add("po") oDs.Tables("po").Columns.Add("ponumberID") oDs.Tables("po").Columns.Add("pos_Id") oDs.Tables("po").Columns("pos_Id").ColumnMapping = MappingType.Hidden oDs.Tables("po").Columns.Add("ponumber") Dim pos_po As DataRelation = oDs.Relations.Add("pos_po", oDs.Tables("pos").Columns("pos_Id"), _ oDs.Tables("po").Columns("pos_Id"))

Categories : Asp Net

gridview click event that uses object data
The object used to load into the GridView is gone as soon as the page unloads. The contents are retained in viewstate, but the object is not there. What you need to do is query the data again using the selected ID. Or link the Grid to a DetailsView, which will query the data, as @Wahtever suggested in the comments.

Categories : C#

display gridview data in another page or other gridview with row data in editable mode
You need to add RowCommand Event in GridView. <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowCommand="GridView1_RowCommand"> <asp:LinkButton ID ="lnkEdit" runat ="server" CommandArgument='<%#Eval("Recordid")%>' CommandName ="cmdEdit" Text ='Edit'></asp:LinkButton> </asp:GridView> Here rocordid is the id of your record. In Page behind you need to write code. protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e) { if (e.CommandName == "cmdEdit") { string Recordid = Convert.ToString(e.CommandArgument.ToString()); Response.Redirect("EditPage.aspx?recordid="+Recordid ); } } On EditPage you can get recordid from the query string and can fetch the record form the datab

Categories : Asp Net

Gridview returning empty even when there is data. I want to use data in the gridview to update another database
Per my comment above you may want to do something like: List<string> _OrderIds = new List<string>(); DataTable table = gvOrderLines.DataSource as DataTable; foreach (GridViewRow gvr in table.Rows) { Label myOrderIDLablel = (Label)gvr.FindControl("lblOrderID"); //find control since it is a template field _OrderIds.Add(myOrderIDLablel.Text); } I hope this get you headed in the right direction.

Categories : C#

Gridview onRowCommand fired gridview no data
Problem in this line ID = gvWorkshop.DataKeys[grdrow.RowIndex]["workshopID"].ToString(); You have mention "grdrow" in place of "row". please change it to ID = gvWorkshop.DataKeys[row.RowIndex]["workshopID"].ToString();

Categories : C#

Gridview, Object reference not set to an instance of an object
Wrap CreatePageList in if(!IsPostBack): protected void Page_Load(object sender, EventArgs e) { if(!IsPostBack) CreatePageList(); } The complete lifecycle is run through on every postback. That is normal. However, you should not databind the grid to it's DataSource from Page_Load on every postback if ViewState is enabled(default). Do that only if something has changed, so for example after you have deleted a row from the delete-event. Otherwise all changes are lost since the previous values are loaded from database, also events aren't triggered anymore. Update You are also creating controls dynamically in RowDataBound. That is not a good place, use RowCreated instead. Dynamic controls must be recreated on every postback. But RowDataBound is called only if the GridView is

Categories : C#

Deleting row from GridView, Object not set to an object reference
Problem is here: dt = (DataTable)GridView1.DataSource; DataSource is not null only when set explicitly in previous steps of the page life cycle. In your case it was not set anywhere during postback (which was triggered by delete command), thus DataSource is null. Correct way to handle this is to run necessary delete query in the DB, retrieve updated info and rebind the grid.

Categories : C#

Export Gridview Data to Excel in ASP.NET Linq data bind
It's pretty easy to set up the excel export that will export only the gridview. This has been tested and will only export the gridview that appears on your given web page. For your C# code use the following: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class vxcel_export : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button2_Click(object sender, EventArgs e) { Response.Clear(); Response.AddHeader("content-disposition", "attachment;filename=file-name.xls"); Response.ContentType = "application/vnd.xlsx"; System.IO.StringWriter stringWrite = new System.IO.StringWriter(); Sys

Categories : Asp Net

Display class object in GridView
you should have defined your class variables like a propertiesbecause you are using them in databinding. like this.. public String Data1 {get;set;} also make your list a ObservableCollection as it will notify the view whenever you change something in your list..

Categories : C#

Improve page rendering time having gridview, child gridview and grand child gridview on it
You are creating way too many grids. A grid is an expensive component. You could alter your user interface to allow users to select an Item and bind the inner grid only on selection. This ensures that rather than one grid per row or parent grid, you will have only one child grid displayed at a time.

Categories : C#

Slow get data from data gridview into SQL Server
A fast way to insert many records into an SQL Server's table is to use the SqlBulkCopy class. First you will need a function which will copy the content of your DataGridView into a DataTable. Private Function GetDataTable() As DataTable Dim DataTable1 As New DataTable Dim i1, i2, RowsCount1 As Integer For i1 = 0 To DataGridView1.Columns.Count - 1 DataTable1.Columns.Add(DataGridView1.Columns(i1).Name, DataGridView1.Columns(i1).ValueType) Next If DataGridView1.AllowUserToAddRows = True Then RowsCount1 = DataGridView1.Rows.Count - 1 Else RowsCount1 = DataGridView1.Rows.Count End If For i1 = 0 To RowsCount1 - 1 DataTable1.Rows.Add(DataTable1.NewRow) For i2 = 0 To DataGridView1.Columns.Count - 1 DataTabl

Categories : Vb.Net

How to bind child objects of an object class to the GridView in ASP.NET?
You could easily use LINQ to flatten the expression, which is commonly a problem with binding to the gridview: var complaints = complaintManager.GetComplaints().Select((i) => new { i.ComplaintID, i.ComplaintRaiser.ComplaintRaiserID, . . }); This binds nicely to the grid. You could try dot notation in the markup as in ComplainRaiser.ComplaintRaiserID for a templated field with an eval (haven't had success with the BoundField myself...)

Categories : Asp Net

Update dynamically an object in a gridview updating its attributes from an IntentService
Approach 3 Finally I have used a middle solution (as often happens). The "Empty Thumbs" have all same view in the GridView. So, when it adds an Empty Thumb to the ArraList also it adds on other list which keeps the position of Empty Thumb within the ArrayList. Next, when a "Full Thumbs" arrives, I get the first position of this new positions list and then I replace in the ArrayList the Empty Thumb with the Full Thumb in this position and finally I delete this position from positions list.

Categories : Android

Object reference not set to an instance of an object. following error coming when i run this code this code i used for check gridview check box
Simply do a null check before using checkbox protected void Button1_Click(object sender, EventArgs e) { for (int i = 0; i < GridView1.Rows.Count; i++) { CheckBox ch = (CheckBox)GridView1.FindControl("chkid"); if (ch != null) { if (ch.Checked) { Response.Write("ch= true"); Label1.Text = GridView1.Rows.ToString(); } else Response.Write("ch= false"); } } }

Categories : C#

Getting data from gridView
You could add Name as another datakeyname <asp:GridView ID="GridViewCategory" runat="server" OnSelectedIndexChanged="GridViewCategory_SelectedIndexChanged" OnPageIndexChanging="GridViewCategory_PageIndexChanging" AllowPaging="True" DataKeyNames="Id, Name" CellPadding="4" ForeColor="#333333" GridLines="None" > <Columns> <asp:BoundField DataField="Id" HeaderText="Идент. номер" ItemStyle-Wrap="false" ItemStyle-Width="20%" /> <asp:BoundField DataField="Name" HeaderText="ALl name For" ItemStyle-Wrap="false" ItemStyle-Width="60%" /> <asp:CommandField SelectText="Избери" ShowSelectButton="True" /> </Columns> Then in your code behind: protected void GridViewCategory_Select

Categories : Asp Net

C# Data GridView, large data
Read Efficiently Paging Through Large Amounts of Data for a walkthrough of setting up custom paging with a GridView control. You will need to have a separate query for the total record count, which should be done first. Then you can calculate the number of pages the grid will have in order to build the paging controls. Total record count / records per page = number of pages Note: the records per page may be hard-coded in the GridView markup or you can have a control on your page that allows the user to pick a page size.

Categories : C#

Getting rid of duplicated data in a GridView
Are you sure that you don't have your aggregates backwards in your SQL? I would have expected it to be written more like this: SELECT people.name, Max(comage.age) age, Max(grad.date) date FROM people INNER JOIN comage ON people.term = comage.term INNER JOIN grad ON people.term = grad.term WHERE people.ID = @ID GROUP BY people.name ORDER BY LastName Which would produce a result set like this: name | age | date ------------------ Jeff | 23 | DEC Jake | 25 | SUM

Categories : C#

Data Binding in GridView
You'll need to bind a list, like a List<FavData> or an ObservableCollection<FavData> to the Hub. Right now, you've got a GridView that among many other attributes, includes initialization of the ItemsSource property. This property is used as the source for a list of items. <GridView x:Name="itemGridView" ItemsSource="{Binding Items}" </GridView> The binding is specified as {Binding Items} which means that for whatever object is bound currently to the Hub, grab the List stored on the Items property. As you currently had set a single FavData instance to the Hub via the DataContext property, and it did not have a property called Items, there was nothing to display. So, my suggestion is to create a list of FavData instances and bind that to the Hub instance instea

Categories : C#

Concatenate Gridview Data
If you saying to display in particular format of grid view data then there is no other way than running loop of customer name and finding its occurrence and merging it, rather than you should try to join the data source , so i suggest to show schema of data source so that any one can help

Categories : C#

How can we put data on particular row index on GridView
but you are assigning to TextBox (TextBox)grdSale.Rows[Index_Next] .FindControl("txtDisplay") = Val_Next.ToString(); which is wrong in first place, as Left side is System.Web.UI.WebContols.TextBox and right side is String . You should try and set the Text of Found TextBox. You should be doing ((TextBox)grdSale.Rows[Index_Next] .FindControl("txtDisplay")).Text = Val_Next.ToString();

Categories : Asp Net

Add data from two databases into one gridview
You can manually bind your gridview using DataBind() to an in memory union of the three database tables. Look at the LINQ Union() extension method / operator. Another approach would be to create a view over the three databases and bind to that.

Categories : C#

Get data from the row of a Dropdown in a Gridview
Check the GridView's DataSource before you do the DataBind(). Since you're missing the full ASPX markup, I'm not sure if you're setting the data source programmatically or with a SqlDataSource. In any case, what will happen often with programmatically-set Data Sources is that they disappear on a PostBack, and when you call that DataBind, you're really DataBinding it to null, which would explain why you're getting string.Empty ("") for the Label's Text property.

Categories : Asp Net

Gridview image data from sqlite
I hope I good understand what you want to do. You can do this using caching images - it will be the fastest way. (Caching images library - lazy list) Then you can put into new activity link into images (which is showing in gridview) and in new activity load that images. Or if you want to use database - load images into database as table of int which you can get from bitmap (or just from ImageView)

Categories : Android

What is the fastest way to load a big data set into a GridView?
I thin there is only one way to load the large data set in to grid-view and it the one you are using right now but if you want to make the performance better I highly recommend using pagination so you have chanks of data loaded on every page therefore you will increase the loading time http://sivanandareddyg.blogspot.com/2011/11/efficient-server-side-paging-with.html http://www.codeproject.com/Articles/125541/Effective-Paging-with-GridView-Control-in-ASP-NET http://www.4guysfromrolla.com/articles/031506-1.aspx

Categories : C#

retrieve data from gridview row to an asp.net form
Add GridView RowCommand event and command argument for image button where you can pass an id or something to determine the current row. <asp:GridView onrowcommand="gvRowCommand" ID="GridView1" runat="server" Height="150px" Width="284px" CssClass="tb" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"> <ItemTemplate> <asp:ImageButton CommandArgument='<%# Eval("SomeId") %>' ID="booking" runat="server" HeaderText="Booking" ImageUrl="booking_icon.ico" /> </ItemTemplate> C# protected void gvRowCommand(object sender, GridViewCommandEventArgs e) { var someId = e.CommandArgument; } VB.Net Protected Sub gvRowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Ha

Categories : Asp Net

C# Retrieving data from ListView with GridView
My answer was in Travis J's comment somewhat. I knew that I may have needed to create this table in a different way so that the output of SelectedItem does not come up as anonymous type. So I have redone how the table is constructed and am now using DataTable. private void Button_Click_1(object sender, RoutedEventArgs e) { Operate op = new Operate(); DataTable users = op.GetUser(); if (users != null) { ResultsView.ItemsSource = users.DefaultView; } } private void ListView_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (ResultsView.SelectedItem != null) { DataRowView line = ResultsView.SelectedItem as DataRowView; string stuff = line.Row.ItemArray[2].ToString(); MessageBox.Show(stuff); } } And this made

Categories : C#

How to add Data To GridView From TextBox & DropDownList
Put another button to insert data into database and write below code on click event. protected void Button2_Click(object sender, EventArgs e) { foreach (GridViewRow oItem in GridView1.Rows) { string str1 = oItem.Cells[0].Text; string str2 = oItem.Cells[1].Text; string str3 = oItem.Cells[2].Text; insertData(str1, str2, str3); } } public void insertData(string str1,string str2,string str3) { SqlConnection cn = new SqlConnection("Your Connection strig"); string sql = "insert into tbl1 (column1,column2,column3) values ('" + str1 + "','" + str2 + "','" + str3 + "')"; SqlCommand cmd = new SqlCommand(sql, cn); cmd.ExecuteNonQuery(); } Thanks

Categories : C#

Why GridView data is generated as links
You are using a ButtonField, you might want to use a BoundField instead: Dim id as New BoundField id.HeaderText = "id" id.DataField = "id"

Categories : Dotnet

how to get gridview all rows data when using paging
You need to save the data in temporary storage in PageIndexChanging event of GrIdView. On final save send the datatable to Sql Server Procedure or loop through the datatable and save it in database. Follow the steps: protected void grdView_PageIndexChanging(object sender, GridViewPageEventArgs e) { fnStoreGridData(); } private void fnStoreGridData() { DataTable TempDataTable = new DataTable(); if(Session["Data"]!=null){ TempDataTable = Session["Data"] as DataTable; } else{ TempDataTable.Columns.Add("exCourse", typeof(string)) ; TempDataTable.Columns.Add("exUniversityCourse", typeof(string)) ; } foreach (GridViewRow row in gvExportCourse.Rows) { Label exCours

Categories : Asp Net

Manually binding data to Gridview
OK. So, regarding the comments: This is my personal experience. I had a SQL query that returned this: |-----------------------------------------------| |Column 1 |Column 2 |Column 3 | |---------------|---------------|---------------| |"c1foor1bar" |"c2foor1bar" |"c3foor1bar" | |"c1foor2bar" |"c2foor2bar" |"c3foor2bar" | |"c1foor3bar" |"c2foor3bar" |"c3foor3bar" | |---------------|---------------|---------------| My aspx page looked like this: <asp:GridView runat="server" id="GridView1" AutoGenerateColumns="false"> <asp:BoundField runat="server" DataField="strFirst"></asp:BoundField> <asp:BoundField runat="server" DataField="strLast"></asp:BoundField> </asp:GridView> And my pageload looked like this:

Categories : C#

dynamic data binding gridview
Your DataTable part is fine and continue to add the True/False text as per the logic. Now you should handle the GridView part. So, define an event handler for the OnRowDataBound event of GridView. In this event only, check for the Text property of the cells, and if True/False, clear the cells and add the required image. <asp:GridView ID="GridView1" OnRowDataBound="GridView1_RowDataBound" ... /> And your event handler will have code as below: protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { Image chkImage = new Image(); chkImage.ImageUrl="~/images/Checked.png"; Image UnchkImage = new Image(); UnchkImage.ImageUrl = "~/images/UnChecked.png"; if (e.Row.RowType == DataControlRowType.DataRow) {

Categories : Asp Net

Gridview rebind data with new parameters
Take a update button Write method for update function public int update_method(string ParameterName) { module c = new module(); c.DB_Connection(); int i; string QRY = "UPDATE TableName SET Parameter_Name='" + ParameterName + "' WHERE Parameter_Name='" + ParameterName + "'"; SqlCommand CMD = new SqlCommand(QRY, c.con); i = CMD.ExecuteNonQuery(); return i; } on button click protected void ButtonUpdate_Click1(object sender, EventArgs e) { update_method(ParameterNametxt.Text); } update_method(farm, common_obj);

Categories : C#

How to load Data from a second table in GridView
Try using join and select the user name too for your object data source and use the user name to display it instead of user id. Refer this link How to do a join in linq to sql with method syntax?

Categories : Asp Net

How can I have gridview showing a different value than its data source?
You can create a new column and set the Property "UnboundType" to object. In the "CustomUnboundColumnData" event you can fill this. So you dont have any link to your datasource. Here is small example: http://www.devexpress.com/Support/Center/Example/Details/E3354

Categories : C#

Keeping Data in GridView after PostBack
This is by design. The problem here is that the SqlDataSource gets re-created when the page loads it does NOT maintains the selectcommand on postback but rather reverts to the one that was set when the DataSource was created. So you need to tell the the SqlDataSource what it had for SelectCommand when it last loaded correctly. Just store the SQL COMMAND in ViewState and enable encryption to protect the contents by setting ViewStateEncryptionMode on the Page directive. [ Always choose security as a standard ] <%@ Page ViewStateEncyptionMode="Always" %> In your button click event store your new command in view state: ViewState["currentCommand"] = "SELECT * FROM USERS WHERE user_id = 1"; UsersSource.SelectCommand = ViewState["currentCommand"]; GridView1.DataBind(); Now in you

Categories : C#

Not retrieving data from Gridview to Excel
I think your problem is in the select statement Try something like SELECT * FROM Customer WHERE CustomerID like '%" + txtCustomerID.Text + "%'" Further to that, you might want to look at using DataAdapter Parameters to avoid SQL Injection

Categories : C#

Unable to loading data into gridview
Sounds as if you have AutoGenerateColumns set to true for the GridView1. You can instead try explicitly specifying the columns in the .aspx file in the order that you would like these columns to appear and bind each column with the appropriate field from the Datasource. <asp:GridView runat="server" id="GridView1"> <Columns> </Columns> </GridView>

Categories : C#

Accesing data from Roles into gridview
You can also achieve same kind of thing by making the extra column of roles in the database and extracting the value of role during the time of login. Now you can store this role in any kind of variables like cookies ,sessions etc and performing the following check in the masterpage if(session[role]==null) { Response.Redirect("Home.aspx"); } else if(session[role]!="User") { Response.Redirect("Home.aspx"); }

Categories : Asp Net

how i can insert data into database from gridview
Try this SqlConnection connStr = new SqlConnection ("Data Source=SERVER;Initial Catalog=HRPR;Persist Security Info=True;User ID=hr;Password=11"); SqlCommand com; protected void Button2_Click(object sender, EventArgs e) { SqlConnection connStr = new SqlConnection("Data Source=SERVER;Initial Catalog=HRPR;Persist Security Info=True;User ID=hr;Password=11"); connStr.Open(); foreach (DataGridViewRow row in dataGridView.SelectedRows) { com = new SqlCommand("INSERT INTO tblExmWrittn(column1,column2....) VALUES( '" + row.Cells[0].Value.ToString(); + "', '" + row.Cells[1].Value.ToString();+ "' , '" + row.Cells[2].Value.ToString();+ "' ,'" + row.Cells[3].Value.ToString();+ "','" + row.Cells[4].Value.ToString();+ "' ,'" + row.Cells[5].Value.ToString();+ "','"

Categories : C#

bootstrap modal gridview dropdown get data key
You may need to use a live event: (I'm assuming that .ddlclass is referencing a < select > box) $(function(){ $('body').on('change', '.ddlclass', function(){ var c = $(this).val(); alert(c); }); }); post up your resulting HTML if you want a more in depth response.

Categories : Jquery



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