I am not clear when do I want to use a webservice over a sqlDataAdapter for dataRetrieval. I want to populate a repeater control which I have been doing from a dataTable that I fill from a sqlDataAdapter. Is there criteria when I would want to use a webservice to fill my dataTable?
View 3 RepliesIn am using following code for paging purpose in asp.net to reduce the load of reading all the records from the database.
SqlDataAdapter.Fill(StartRecord,MaxRecords, DataTable);
I want to know whether this code Get all data from data base and filter the records in application or just fetch the needed records only.
I am trying to use a SqlDataAdapter to fill a DataTable, which I use as a data source to a DataGrid. The query is fine, at least when I run it manually in SSMSE. When I do the fill operation, the table gets the right columns, but no rows. The most frustrating part of this is that the code is identical (with a different query) on a different page. I cannot post the query, but my initialization code looks like this:
SqlCommand areaDAC = new SqlCommand (areaQuery, connection);
areaDAC.Parameters.Add (new SqlParameter ("@param", System.Data.SqlDbType.NVarChar, 50));
m_areaDataAdapter = new SqlDataAdapter (areaDAC);
Then to use it:
m_areaDataAdapter.SelectCommand.Parameters["@param"].Value = "Filter Val";
DataTable table = new DataTable ();
m_areaDataAdapter.Fill (table);
At this point, table has the right number of columns and no rows. I know the parameters are being added correctly, I know that data exists for the given query.
Update (as provided by Nik in a comment):
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I'm using the following query as an SqlCommand:
[Code]....
It obviously doesn't work...what can I do? I cannot use the "Merge" method, because I am working with several tables in a single SELECT statment.
trying to merge two sets of data from a SqlDataAdapter and an OleDataAdapter and then populate a gridview on a button click. If I run just the SqldataAdapter on its own the grid populates as expected. This also applies to the OleDataAdapter. The problem arises when I try to merge the two. I get an empty table, hence dt3 is not populating. The code i'm using is below.Does anyone know why this doesn't work?
[Code]....
Using C#, Visual Studio 2010
I have 8 drop downlists created in .aspx page.
I try to programmatically fill the 8 using a single datatable. Each dropdownlist has its own column in the datatable and is supposed to display only the column that corresponds to it. It does display the column it is supposed to however it also displays a number of empty slots equal to all the other columns combined.Here is the code can someone tell me why I get the empty slots?
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I have bind the Repeater control . After filling the Repeater control . I am dynamically binding the Dropdownlist. Now , if i have 3 rows in repeater the last two rows are binded in dropdownlist but i am unable to bind the first record's dropdownlist. Here's my code for dropdownlist binding
foreach (RepeaterItem item in Rpt_TaskList.Items)
{
DropDownList ddl = (DropDownList)(e.Item.FindControl("ddl_StdResourceName"));
objTrackerPage = new TrackerPage();
DataSet Dset = objTrackerPage.GetResourceName(Session["ResourceName"].ToString());
if (Dset.Tables[0].Rows.Count > 0 && ddl!= null)
{
ddl.DataSource = Dset;
ddl.DataTextField = "ResourceName";
ddl.DataValueField = "ResourceId";
ddl.DataBind();
}
}
}
i'm developing a website to my office, i have a question related data loadinf performance related.
dataadapter.Fill() or dataTable.Load(Datareader) give the best performance in asp.net ??
I'm trying to add new rows to a data table and then use the sqldataadapter update method bu fund some problems. First, I written this code:
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Excuse me but the most part of variable are in italian, however I think it is possible to understand how does it work. If I execute this code I obtain this error:
System.InvalidOperationException: Update requires a valid InsertCommand when passed DataRow collection with new rows.
After this I added these lines of code just above the last line:
SqlCommandBuilder cb = new SqlCommandBuilder(adapter);
adapter.InsertCommand = cb.GetInsertCommand;
and I obtained this error:
Cannot convert method group 'GetInsertCommand' to non-delegate type 'System.Data.SqlClient.SqlCommand'. Did you intend to invoke the method?
This issue has stumped me for a while. Hopefully someone here can give me some insight.
When my site runs the following code it works just fine 99% of the time.
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The command is calling a SQL Server 2005 stored procedure that takes 20 parameters and returns 6 tables of about 5-50 rows each. The paramters are all NVARCHAR, INT, or BIT data types. Only one of the parameters is Input/Output. There is a total of about 100 rows returned. Normally this takes a fraction of a second, but for some queries, it times out after 30 seconds.
When I run the exact same query in the Management Studio query window it takes 1 second.
what I can do to get the same performance from .Net as I am getting from Management Studio?
I have created the templatefields in my dynamically created gridview, however, how do i get the values from my dataTable (which populates my gridview) to load into the templatefields I have created?
View 1 RepliesI have no problem when paging my FormView, the dropdownlist does not read the next record and keep the value of the first loaded record? All other textbox control behave normally and move from record to record excepted the ddl??Here the code.
Public Sub DoData()
Dim myConn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("LocalSqlServer").ConnectionString)
Dim myCommand As SqlCommand = New SqlCommand("SelectSupplier", myConn)
myCommand.CommandText = "SelectSupplier"
[Code]....
my repeater binding repeated rows.
TableAdapters.myorderTableAdapter tblerows= new TableAdapters.myorderTableAdapter();
DataTable dt = tblerows.GetDataByUserName(username);
DataTable outputTable = dt;
for (int i = 0; i < 4; i++)
{
outputTable.ImportRow(dt.Rows[i]);
}
Repeater1.DataSource = outputTable;
Repeater1.DataBind();
from the above code i got number of rows for the seleted username. so i need to show only resulted rows. here repeater1 repeating my rows.
Can we convert the Repeater items back to a datasource?
At post back, I want to convert the repeater items into a datatable which is a datasource was given to the repeater.
This is what i want to do with my website. I want to pull data from an access query and and load it into a listview table. The user will sort through the data on the website and remove the rows she doesn't want. After the user is done, they will click a send button that will email the data to the appropriate party.I have read the access query data into a data table. I have the list view table built, but I am unsure how bind the data table into the listview table. Is this the best route to go? Will binding the datatable to the listview table allow the user to delete rows out of the datatable?
Protected Sub btnView_Click(sender As Object, e As System.EventArgs) Handles btnView.Click
Dim query As New QueryBuilder.SelectQuery("qryVendorReport")
'Fill data table with vendor information
Dim sample As String = ""
Dim results As New DataTable
results = (db.fillTable(query.toSelectQuery))
[code]...
how to bind the results datatable to lvdatasource. I tried a few different ways to do this with no luck. Maybe the syntax I trying to use is incorrect.
Still quite new to this ASP.NET lark. I want to populate a set of controls with data from a repeater by clicking the repeater row. I was thinking about setting the value of a hidden field to the id of the row then doing a postback, using the ID to look the values up from my backend. 2 of the controls i need to poulate are ajax cascading dropdowns, so I will need to do a postback and not just set them via javascript.
View 6 Repliescan datatable pass to web service as input parameter? i have a scenario to pass values as datatable to web service. eg as follows
when Invoice or Bill is entered, I want to send the entered data as datatable to web service to insert into another application.
I am trying to import a CSV file using web service bt i stuck while displaying it in gridview.
View 1 RepliesI want to orderby the list. Today date is on the top and then next date and all dates but when today date is passed then it comes on the end of the list. Is there any formal query in linq or some other code is used to achieve this?
08/01/2015
09/01/2015
but when today is passed then it automatically go to end and next today date is on the top
I need to display the results of a stored procedure in to table tag in asp.net c#. I do not know how to use reasonable control in this case.
View 1 Repliesusing linqs how to fill datatable using linq to sql in asp.net
i have one storedprocedure to select data from table
and one s.p for insert the data and one for update the data
how i use these s.p to insert and update the data using linq. to sql
I am gettin error in this code
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I have a repester like this that bind it with asp.net :
<ul class="menu">
<asp:Repeater ID="rpt_website" runat="server">
<ItemTemplate>
<li tabindex="1">
<img src='<%#Eval("Pic","Images/Portfolio/{0}") %>' alt='<%#Eval("Title")%>' width="200" height="120" class="AbsolPos" />
[code]...
now i want to bind this repeater with jquery ajax , and I use this link for bind my repeater with jquery ajax , but it does not work.
i need to display whole table including headers with repeater ,,
View 1 RepliesI am using Asp.Net web-application. How exactly to create UL menu with ListView control such as :
<ul> <li> <a href="#">Item #1</a> <ul> <li> <a href="#">SubItem #1</a> </li> </ul> </li></ul>
MenuId SubMenuId MenuName MenuUrl
1 0 Home Home.aspx
2 0 Administration Administration.aspx
3 2 Add User AddUser.aspx
4 2 Add Organizaion Add Organizaion.aspx
5 2 Add Program AddProgram.aspx
6 2 Add Activity AddActivity.aspx
7 0 Search Search.aspx
8 0 Utilities Utilities.aspx
9 0 ContactUs Contact.aspx
I have a number of dropdownlists which use cascading dropdownlist / webservices. All fine. Now user wants last dropdown to be multi-select. So I want to replace the last dropdownlist with a listbox. But there is no cascadinglistbox. I'm looking for a straight-forward solution if possible. Either how to fill the listbox with the existing webservice which fills the last dropdownlist, or - is it possible to use the contrents of the last dropdown as a datasource for the listbox? I thought maybe hide the last dropdown and loop through its contents to fill the listbox.
View 2 Replies