I am trying to use like to query my datatable. The datatable has confirmed records and the column name is confirmed to be correct. The problem is, if I pass in the case sensitive word "FRANK THOMAS", the query returnes results. The problem is, I do not want to have to deal with the user typing in "frank thomas" and having it fail.Here is the code.
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I have a SQL query returning a datatable which returns data such as:
ID, Email adress, logon name,
1,joe@bloggs.com,jb1
2,joe@bloggs.com,jb2
3,joe@bloggs.com,jb3
4,bloggs@joe.com,bj1
5,bloggs@joe.com,bj2
6,bloggs@joe.com,bj3
I need to send an email to ALL the above unique email addresses in column 2, listing all the logons for that person. My question is, in terms of best practice, Whats the best way to do? Should i either
1) Query the local datatable in the application, if so how do i query a local DataTable object?
2) Modify my initial query to return all the unique email addresses and then again query to retrieve the logons for that email address inside a for loop for eaxmple.
Was trying to minimise the hits to the database, whats the preferred way to do something like this?
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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how to convert a linq query to a datatable
this is my query
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My web application calls a stored procedure and stores the result in a .NET datatable. I'd like to use this datatable and join it with other tables in my database. Is this possible?
Would the best way to set this up be to create another datatable and then use a dataview to join both datatables?
how to extract DataTable or DataSet from Linq Query or List. e.g I have linq query like this
MyDBpDataContext dcSp = new MyDBpDataContext();
dcSp.myProgrammSP().ToList();
I wrote an Sp which sends a Table as result and I have code which is already using DataTable So I want to convert this result in DataTable.
I am trying to run a linq query but I need the result as a datatable as I am using that to store records from different queries in the same viewstate object.The 2 versions below compile, but return an empty set. The exact error is "Value cannot be null.Parameter name: source". (and yes I have checked there is data):
MyDatabaseDataContext db = new MyDatabaseDataContext(conn);
IEnumerable<DataRow> queryProjects =
(from DataRow p in db.STREAM_PROJECTs.AsEnumerable()
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I have to filter the records from the data table based on the date.
I am having a column in data table called "cStartDate".
I will enter the begin and end date. I have to find out whethere the "cStartDate" is within the begin and end date i entered.
I am going to implement the filter logic in data table with out affecting the data base.
I need a Filter string for this.
I would like to send json data from a HTML table to the ASP.NET code-behind and update the data in and SQL Server database. The code and JSON for the TableProductToUpdate() is below.
function UpdateProductTable() {
$.ajax({
type: "POST",
url: "Default.aspx/UpdateProductTable",
data: "{'products':" + JSON.stringify(TableProductToUpdate()) + "}",
[code]...
'DataTable' is an ambiguous reference between 'System.Data.DataTable' and 'Microsoft.Office.Interop.Word.DataTable'
View 3 RepliesI'm writing a web service that needs to query an Access 2003 database (.mdb). I've found the following code in doing some research on OLEDB connections and queries:
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Errors are as follows:
Error 3 A field initializer cannot reference the non-static field, method, or property 'CompleteRentalls.completedb.sqlString'
Error 5 'CompleteRentalls.completedb.da' is a 'field' but is used like a 'type'
Can anyone help me rectify the above code such that the query results are returned to my datatable?
I was reading: [URL]
But I have give a compilation error:
CS0246: The type or namespace name 'DataTable' could not be found (are you missing a using directive or an assembly reference?
i have the dataset with one table.Table contains three column like 'Name','Location','Pin'.I would like to move the data from another table based on schema.
View 2 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 Repliesim trying to copying specific record from one datatable to another datatable i used below code
public System.Data.DataTable selectspecificdatarow(System.Data.DataTable dtg, int count, int startindex)
{
System.Data.DataTable dtn = dtg.Clone();
for (int i =startindex; i < count; i++)
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its taking too long time in cloneing is there any better way to do this task which is Time effecent
how to join two datatable datas into one datatable to show in one gridview
i.e in 1 datatable i have username and pwd and in another datatable i have that user details. how to show all these in one datatable to get those values display in gridview(asp.net)
Dim dt As New DataTable Dim da As New SqlDataAdapter(s, c)
c.Open()
if Not IsNothing(da) Then
da.Fill(dt)
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When I call da.fill I am inserting all records from my query. I was then hoping to filter them to display only those where the GroupingID is equal to 0. When I run the above code. I am presented with all the data, the filter did not work. Please can you tell me how to get this working correctly.
how to copy data from datatable to table in dataset i ry this but its readonly property
ds.datatable1=newdt.copy
I have a DataTable of available time slots. I have another DataTable of reserved time slots. I need to remove from the list of available slots the ones that have been reserved. The blocks are in 15 minute increments, but one of my problems is that the reservation can be longer than 15 minutes. I've had some luck removing one or two, but not all of the required columns.
Here's my code (it doesn't work right now).
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I have two datatables, I want to get all records which are in one datatable but all matching records which exist in another datatable should not be available.
In terms of set, you can say that record which are in 1st datatable but not in 2nd DataTable.
how to copy only the columns in a DataTable to another DataTable?
View 2 RepliesI have a datatable with 17 columns and a bunch of data. I wnat a datatable with only 6 of the columns and the data for those 6 columns. So I need a subset of the original datatable. How do I loop through the original datatable with 17 columns and end up with a datatable with only the 6 columns I want with the corresponding data for those 6 columns?
View 4 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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There has to be an easy answer:I want to loop through multiple datatables... example:
for (int i = 1 ; i < 7 ; i ++ )
{
DataTable dt = (DataTable) "dt" + i.toString();
// do something with DataTable dt1 as DataTable
// ie...
int x = dt.Rows.Count
}
The above code obviously does not work.. but how do you find a DataTable like you do FindControl with WebControls??
1. I have a GridView on my page and it uses sqldatasource with parameterized query. What I want to do is, on page load (where nothing has been selected so no parameter supplied), I want it to query everything (something like SELECT * FROM [this_table]) but since my SelectCommand is something like
SELECT * FROM [this_table] WHERE [this_column] = @someParameters AND [that_column] = @someParameters.
Can I play around with default value to achieve something like that but how ? Now, when the page loads, it doesn't show anything (No Gridview).
2. On my page, I made something like (username, gender, address, and more) and one single search button. That means, no single control enable auto postback. What I am trying to accomplish is building dynamic query
(if username specifed -> SELECT * FROM [this_table] WHERE [username] LIKE @username).
If both username and gender are specified (SELECT * FROM [this_table] WHERE [username] LIKE @username AND [gender] = @gender) and you know the rest. How can I do this using GridView and SqlDataSource ? To my knowledge, I can only specify one SELECT statement in a sqldatasource.