I need to add rows to an existing (maybe) datatable in a dataset that combines the IIS6 index search with my own sql table. I keep getting object reference errors.
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To Add new row to a dataset table, I am using code below. Before adding this how do I check if that row has already been added to the dataset?
Example:
Dim newCustomersRow As DataRow = DataSet1.Tables("Customers").NewRow()
newCustomersRow("CustomerID") = "ALFKI"
newCustomersRow("CompanyName") = "Alfreds Futterkiste"
DataSet1.Tables("Customers").Rows.Add(newCustomersRow)
Note: The table I am dealing with does not contain a primary key!
I am populating DataRows in a Datatable using an SQL query. How can I population the first row with a C_ID value of 0000 and C_Name field with "Select" ?
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I need to create an interface for adding users to .Net Membership DB through an existing database. My Idea is to read each row from database from existing users table in a datatable and then iterate through each row and add it to new database. I cannot directly copy the rows from existing users table because the password stored in .Net Membership provider is in ir-reversible hash code and hashing is done through encryption algorithm present in front end code. My User count is huge (in millions).So what should i use to read the records, Dataset or datatable. Also tell what is the max number of rows it can hold.
View 3 RepliesIf I am passed a datatable and I cant change the column structure..is there anyway to set an existing column to a Primary key so I can easily Find() the row I am looking for?
View 1 RepliesBelow is a beginning attempt to increment through a DataTable populated by a Stored Procedure and create a new DataTable where every Category is represented by exactly four products. I need to add dummy product entries for some and skip over those with over four products.
A) - I think I understand the basics but this builing from scratch is not my practice.
1) I do not know how to query a previous row in reference DataTable.
2) I do not know how to jump to next row from IF construct.
3) I hope I am able to build a DataTable row by row.
4) Partial sample data is at bottom of pseudo code
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how to copy data from datatable to table in dataset i ry this but its readonly property
ds.datatable1=newdt.copy
I am writing to a CSV that will contain different customer information. Right now when I write to it, it overwrites whatever is in the path right now. Instead of overwriting I would like the new writer.WriteLine to append to the current CSV without overwriting it.
Code
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Also, can anyone help me with writing the file to a different location other than my local project file? I need the path to become a server location instead of the CSV folder stored locally.
What options do I have for adding a blog to an existing ASP.NET Web Forms web site. Ideally it should be able to transition to MVS as and when my site does.
View 3 RepliesI have two extremely long queries that I am running on multiple tables, using an INNER JOIN. The only difference between these two queries is that they take different input values for one of the WHERE clauses, which they get from two separate DropDownLists. The results of these queries are identical, save for the time1/time2 columns.string query1 = "select Name = t1.name, time1=(SELECT hours FROM table3 WHERE street=list1.selectedvalue), t2.address from [table1] t1 INNER JOIN [table2] t2 ON t1.param = t2.param ORDER BY Name"
View 1 RepliesWhat are the steps to implement webparts into an existing application that already has been set up to use asp.net membership? I have yet to see how to get this to work. The only thing I am accomplishing is generating the following error:
The specified connectionStringName, 'LocalSqlServer', was not registered. (C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Configweb.config line 312) at System.Web.Configuration.ProvidersHelper.InstantiateProvider(ProviderSettings providerSettings, Type providerType) at System.Web.Configuration.ProvidersHelper.InstantiateProviders(ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType).
So, what is the deal here? Is it because my site uses masterpages? I have profile, roleManager, membership and connectionstrings in my web.config. I tried adding a webpart section, like I found on one website, to no avail. I was still getting the 'LocalSqlServer' error bunk.
I need your help / guidence for doing custom paging in c#, through sqlserver. so that i can have data in dataset/datatable according to the pagesize given, not all the data in dataset. some code /url .......with full discrption if possible.
View 12 Repliesif (dt.Rows[i]["Code"] == code)
{
Label lblLang = (Label)(((e.Item as GridItem).FindControl("lblLang") as Label));
lblLang.Visible = true;
}
else
{
}
}
I am adding a new language Fr-FR in the code above. fr-FR already exists in my DB's Language Table. I do not want to add duplicate values in my table. There should be only one fr-FR.
I have a DataTable which having some rows which bind from database. I would like to add some new rows to that datatable.
I used the following code.
conn.Open();
SqlCommand cmdDownload = conn.CreateCommand();
cmdDownload.CommandType = CommandType.Text;
cmdDownload.CommandText = "select SKUCode,'Image Available' as [Status] "
+ "from tblName"
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But the new rows are not adding to the datatable.
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like above link i want to bind
name.....................
city...... country.........
for suppose 10 employee. for that i try to bind datalist using webservice & jquery. but i get lots of problem to bind datalist. with name as hyperlink so that when i click at name it go to next page and show details.
I have following issue: I have a datatable with a column which I would like to encrypt. This table has about 10.000 rows, and this particular column is storing 14 digit keys. Is there any way to encrypt all those keys in this particular column (just to make them useless if someone steals by db)?
View 6 RepliesI have a Gridview on my aspx page. On my page_load event I check for a record in the database, if the record exists for that row in the gridview I would like to add a new column in the same gridview and add a button control to it. This adding of new column in the Gridview should happen in the codebehind (c#). see the code I wrote for this, but when I run it, it does not create any column on the gridview page.
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I have created a dataset in the ASP.Net. I'd like to use the same dataset with my SSRS Report.I am aware it is possible with the ReportViewer.LocalReport with the following code:ReportViewer.LocalReport.DataSources.Add(ds).What I'd like to do is to associate the dataset with ReportViewer.ServerReport so I can avoid calling the stored procedure and save on performance time.
View 5 RepliesI have created a datatable with three fields namely TimeTask, TaskItem and Count (count of user) eg; {"12:30AM-01:00AM" , T1 , 3}.
dataTable.Columns.Add("Task Time", typeof(string));
dataTable.Columns.Add("Task", typeof(string));
dataTable.Columns.Add("Count", typeof(int));
dataTable.Rows.Add("12:00AM-12:15AM", "T1", 6);
dataTable.Rows.Add("12:45AM-01:00AM", "T1", 5);
dataTable.Rows.Add("01:00AM-01:15AM", "T1", 1);
dataTable.Rows.Add("01:15AM-01:30AM", "T2", 4);
dataTable.Rows.Add("01:30AM-01:45AM", "T2", 9);
GridView1.DataSource = dataTable;
GridView1.DataBind();
In this there is no task for the TimeTask "12:15AM-12:30AM" and "12:30AM-12:45AM" yet the TimeTask should be inserted as,
TimeTask TaskItem Count
12:00AM-12:15AM T1 6
12:15AM-12:30AM - -
12:30AM-12:45AM - -
12:45AM-01:00AM T1 5
01:00AM-01:15AM T1 1
01:15AM-01:30AM T2 4
01:30AM-01:45AM T2 9
How to chk for the missing rows? Is it possible to dynamically insert rows in an existing DataTable (No DataSource used) in this scenario.
I have a dataset that has around 5 rows. I also have another Datarow() array that has an additional 3 rows which I would want to add to the dataset. The structure of both the Dataset Rows and the Datarow arrays are the same.
Do I have to perform a loop on the datatrow arrays and add them one by one? or is there a better way of adding them in one go ?
I have one problem with my shopping cart that I really can't figure out all by myself.I want, if a item already exist in the datatable, the quantity to be updated for that item with the new number instead of creating the same item again.I have done a foreach loop because I think that is where I should start.Notes: MyRow[3] is the column holding the quantity.Code:
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//Bengt
I have added a row to a datatable and displayed this datatable by binding it to gridview.. Later if i add another row to the same table, the data table displays only the recently added row.. I need to display the previously added row along with the newly added row.. How to do this?
View 1 RepliesIf I need to fetch one whole column from Table1 in the DB, should I fetch it using datatable or dataset? I can do both ways. I mean ok I should use Datatable. Why is that? What would happen if I use Dataset? ok that's what I wanted to know. So there's memory issue. I mean whatever I use be it Datatable or Dataset, both will be fetching only ONE column frommy table in DB. How is Dateset's gonna use more memory then?
View 3 RepliesI want to add WCF to existing asp.net application and host both of them in the same virtual directory is it possible ?? Also when i click new item to add app.config file from visual studio its not showing.
View 3 RepliesI have created alot of stored procedures in my application that return the result of a query in a datatable object. I never use a dataset. Why would I ever use a dataset over simply returning the result of a query as a datatable object?
View 3 Replies