select distinct records from datatable linq

Ngày tải lên: 11/08/2014, 23:22

Ngày tải lên: 14/08/2014, 20:20

... 5.1 Copying Rows from One DataTable to Another Problem You have records in a DataTable that you need to copy to another DataTable. Solution Use the ImportRow( ) method of the DataTable to copy ... of the DataTable using the row index. ã Use the Select( ) method of the DataTable. ã Use the RowFilter property of a DataView for the DataTable. The sample code creates a source DataTable ... the ImportRow( ) method of the DataTable to copy DataRow objects from one DataTable to another. Three techniques for selecting records to copy are demonstrated in the following example: ã Use...

Ngày tải lên: 28/10/2013, 18:15

... [ Team LiB ] Recipe 2.17 Displaying Columns from a Related DataTable Problem You want to add a column to a DataTable that displays a value from a row in a related table in the DataSet. ... child records within an expression by affixing the beginning o f the column name in the child table with Child. or Child(DataRelationName). depending on whether the row has child records from ... and the Order Details table from Northwind. A DataRelation is created between the tables. A column is added to the Order Details table that gets the CustomerID from the parent Order using the...

Ngày tải lên: 21/01/2014, 11:20

... Creating a Table in the Database from a DataTable Schema Problem You need to create a table in a database from an existing DataTable schema. Solution Use the CreateTableFromSchema( ) method shown ... CreateTableFromSchema (DataTable dt, String connectionString) { // Drop the new table if it is already there. StringBuilder sqlCmd = new StringBuilder( "if exists (SELECT * FROM dbo.sysobjects ... sqlText = " ;SELECT * FROM [Orders]"; SqlDataAdapter da = new SqlDataAdapter(sqlText, ConfigurationSettings.AppSettings["Sql_ConnectString"]); DataTable dt = new DataTable( "Orders");...

Ngày tải lên: 21/01/2014, 11:20

... purposes. After you have your DataTable object loaded in memory, you want to be able to locate specific records within the DataTable object. How do you locate records in the DataTable object? Technique ... when you select an item from the combo box. When an item is selected in the combo box, the SelectedIndexChanged event is fired off. Within this event, you will take the combo box's SelectedItem, ... added to the SelectedIndexChanged event of the cboCustomers ComboBox control. As with the last step, when a data column was 3.3 Locate Records with the DataTable Object Using the DataTable...

Ngày tải lên: 21/01/2014, 12:20

... OleDb.OleDbDataAdapter Dim dtCust As DataTable = New DataTable( ) Dim strSQL As String ' Create the SQL String strSQL = " ;Select CustomerID, CompanyName From Customers " & _ ... Try-Catch-End-Try block of code. Listing 3.3 frmHowTo3_2.vb: Loading a List Box By Using the DataTable Object Private Sub btnLoadList_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) ... the scene for using the list box in retrieving data in the next How-To. Remember: By using the DataTable object, you can assign both the display value and the data item to be tracked. 1....

Ngày tải lên: 26/01/2014, 11:20

... Customers .CustomerID = Orders.CustomerID To limit the records, use the DISTINCT clause: SELECT DISTINCT Customers.CompanyName FROM Customers INNER JOIN Orders ON Customers.CustomerID = ... because this is the default. You will create two SELECT statements for this task. The first one is for all records: SELECT Customers.CompanyName FROM Customers INNER JOIN Orders ON Customers ... strSQL As String strSQL = " ;SELECT " If blnUseDistinct Then strSQL += " ;DISTINCT " End If strSQL += "Customers.CompanyName FROM Customers " strSQL +=...

Ngày tải lên: 26/01/2014, 11:20

... M, Ushiki YK & Shinagawa M (2005) The N-terminal cleavage site of PrP Sc from BSE differs from that of PrP Sc from scrapie. Biochem Biophys Res Com- mun 328, 1024–1027. 37 Parchi P, Zou W, ... Homogenates of mice were prepared using pooled whole brains from four individuals. Human homogenates derived from pooled tissues obtained from several different brain regions of six subjects. The ... cerebellum. Brain homogenates of cattle were obtained from the brain stems of six animals. Pooled homogenates of sheep brains were prepared from tissues taken from var- ious regions of five animals. Furthermore,...

Ngày tải lên: 19/02/2014, 02:20

... techniques col- lect botnets traffic from the “inside”, using IRC channel infiltration[3, 6, 11] or traffic redirection [8]. The second category of techniques track botnets from external traces, for example, ... new category of traces can be used to characterize botnets from different perspectives (see Sec- tion 6). Our work takes activities from individual bots and aggregates them into botnets. The ... content are sent from the same controlling en- tity. Our first step is to identify these groups of mes- sages, which we will refer to as spam campaigns. A lot of spam messages from the same campaign...

Ngày tải lên: 19/02/2014, 18:20

... 268) q FEBS 2001 Binding of gelsolin domain 2 to actin An actin interface distinct from that of gelsolin domain 1 and from ADF/cofilin Celine Renoult 1 , Laurence Blondin 1 , Abdellatif Fattoum 2 , ... actin sequences were selectively purified by affinity chromato- graphy [23]. Anti-IgG antibodies labelled with alkaline phosphatase were from Sigma. Synthetic peptides derived from actin and gelsolin sequences ... peptides Rabbit skeletal muscle actin was isolated from acetone powder [18], and stored in buffer G (2 m M Tris, 0.1 mM CaCl 2 0.1 mM ATP pH 7.5). Actin was selectively cleaved by Staphylcoccus aureus...

Ngày tải lên: 22/02/2014, 07:20

... V were obtained from Santa Cruz Biotechno- logy (Santa Cruz, CA, USA). Mouse monoclonal anti- vimentin serum was obtained from Sigma (Poole, UK). Anti-caveolin sera were a gift from N. M. Hooper ... S100 serum was acquired from Swant (Bellinzona, Switzerland). Secondary FITC- and rhodamine-conjugated antibodies were from Sigma. Citi- fluor mounting medium was obtained from Agar Scientific (Stansted, ... monoclonal C4 actin antibody was obtained from ICN Biomedicals (Irvine, CA, USA) and Chemicon (Temecula, CA, USA). Rabbit polyclonal anti-(annexin I) was a gift from E. Solito (Paris, France). Mouse...

Ngày tải lên: 16/03/2014, 18:20

... microdomains different from classical lipid rafts enriched in Src-family kinases. We demonstrate that Brij-96 can selectively isolate the Pgp domains, separating them from the caveolar and classical ... microdomains represent distinct plasma membrane regions [27,28]. Caveolin-1, GM 1 ganglioside and cholesterol are believed to be hallmarks of caveolae which are distinct from the classical lipid ... density gradient fractions of extracts from untreated CH R B30 cells and from cells treated with MbCD, and found that cholesterol was effectively removed from the lipid raft fractions obtained...

Ngày tải lên: 16/03/2014, 23:20

... A distinct sequence in the adenine nucleotide translocase from Artemia franciscana embryos is associated with insensitivity to ... region with 48–56% similarity to those from other species, includ- ing the deletion of three amino acids in positions 211, 212 and 219. Mito- chondria isolated from the liver of Xenopus laevis, in ... Filter was used in energy filter mode. Electrons with a preselected energy are only used to form an image in EFTEM mode. A spatial map of one selected element (calcium or phosphorus) was obtained...

Ngày tải lên: 29/03/2014, 00:20

... and 5Â-TTTCCTGAATGCAGATGACTCTAT-3Â from AtSig2 and 5Â-GTAGAGATGAACTGGTGAA AAGCA-3Â and 5Â-AAAACTTGTAACCCCTTGTGT GAT-3Â from AtSig3, were used for PCR-amplication from total S. alba DNA. The products ... & Link, G. (1993) Sigma-like transcription factors from mustard (Sinapis alba L.) etioplast are similar in size to, but functionally distinct from, their chloroplast counterparts. Plant Mol. Biol. ... were detected only with blotted proteins from dark-grown seedlings (lane 4), where SASIG3 seems to be present in higher relative amounts than in the fraction from light-grown material (lane 3). It...

Ngày tải lên: 31/03/2014, 07:20

... that Ab1–40 can aggregate via distinct mechanisms was supported by the AFM results, which show that aggregates formed slowly at pH 7.4 are distinct in appearance from those formed in the presence ... described previously [27]. Congo red was obtained from Sigma Chemical Co. (St Louis, MO, USA). Highly oriented pyrolytic graphite (HOPG) was purchased from Group Scientific Pty. Ltd. (Adelaide, Australia). Synthesis ... concentration of aggregated Ab was calculated from the equation, Ab (lgặmL )1 ) ẳ ( 541nm Abs/ 4780) ) ( 403nm Abs/6830) ) ( 403nm Abs CR alone /8620) from Klunk et al. [30]. The amount of aggregated...

Ngày tải lên: 31/03/2014, 07:20

... Formatting Numbers Crosstab Queries − Select a grouping method from the Functions list. − Choose whether to include row sums by selecting the check box on the same page as the function ... Queries − Select the field(s) whose values you want to use as row headings  click Next. − Select the field(s) whose values you want to use as column headings  click Next. − If select a date ... to group dates from the list Next. − Choose the field whose values grouped by the row and column headings that are selected. Summarizing Data  For each field, choose an option from the Total...

Ngày tải lên: 04/05/2014, 23:03

Ngày tải lên: 19/06/2014, 08:20

Ngày tải lên: 09/08/2014, 14:21

Ngày tải lên: 09/08/2014, 20:22