dataset

问题 I have converted a complex XML File to a Dataset that has 7 Tables and around 70 Columns I have created the tables in SQL Server to match the ones in the Dataset using the XML Schema. How can I easily write my Dataset to the SQL tables? 回答1: Depending on how many rows you have in the DataSet, probably the best thing to do would be to use a SqlCommandBuilder, like so: var connection = new SqlConnection("my connection string"); connection.Open(); // repeat for each table in data set var

问题 I have a dataset that is dynamically created from a csv file. What I want to do is insert the rows into my MS Access table but I cannot figure out where to start with this. The headers of the data in the dataset can vary as far as the order but the name of the header will always match the access database. Do I have to statically call out the header name in the insert command or can I build the headers from the dataset? I know how to create the connection and open it to the database but am not

问题 DISCLAIMER: this is a copy paste from an older stackoverflow post that isn't available anymore, but I have exaclty the same problem, so it seemed appropriate to repost it as it was never answered. I have a stored procedure that will return 4 result sets (contacts, addresses, email, phones) which is populated into a dataset. I would like to use AutoMapper to populate a complex object. public class Contact { public Guid ContactId { get; set; } public string FirstName { get; set; } public string

问题 DISCLAIMER: this is a copy paste from an older stackoverflow post that isn't available anymore, but I have exaclty the same problem, so it seemed appropriate to repost it as it was never answered. I have a stored procedure that will return 4 result sets (contacts, addresses, email, phones) which is populated into a dataset. I would like to use AutoMapper to populate a complex object. public class Contact { public Guid ContactId { get; set; } public string FirstName { get; set; } public string

问题 I'd like to be able to open a TDataSet asynchronously in its own thread so that the main VCL thread can continue until that's done, and then have the main VCL thread read from that TDataSet afterwards. I've done some experimenting and have gotten into some very weird situations, so I'm wondering if anyone has done this before. I've seen some sample apps where a TDataSet is created in a separate thread, it's opened and then data is read from it, but that's all done in the separate thread. I'm

问题 i try to get some Data from a Access Database via OleDB in a DataSet . But the DataSet is empty after the Fill() method. The same statement works and return 1 row when i trigger them manually in D*. OleDbConnection connection = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=Inventar.accdb"); DataSet1 DS = new DataSet1(); connection.Open(); OleDbDataAdapter DBAdapter = new OleDbDataAdapter( @"SELECT tbl_Computer.*, tbl_Besitzer.* FROM tbl_Computer INNER JOIN tbl_Besitzer ON

问题 I am doing some exercises with datasets like so: List with many dictionaries users = [ {"id": 0, "name": "Ashley"}, {"id": 1, "name": "Ben"}, {"id": 2, "name": "Conrad"}, {"id": 3, "name": "Doug"}, {"id": 4, "name": "Evin"}, {"id": 5, "name": "Florian"}, {"id": 6, "name": "Gerald"} ] Dictionary with few lists users2 = { "id": [0, 1, 2, 3, 4, 5, 6], "name": ["Ashley", "Ben", "Conrad", "Doug","Evin", "Florian", "Gerald"] } Pandas dataframes import pandas as pd pd_users = pd.DataFrame(users) pd

问题 I am trying a "very" simple task to output values of each rows from a DataSet : for ($i=0;$i -le $ds.Tables[1].Rows.Count;$i++) { Write-Host 'value is : ' + $i + ' ' + $ds.Tables[1].Rows[$i][0] } gives output ... value is : +0+ +System.Data.DataSet.Tables[1].Rows[0][0] value is : +1+ +System.Data.DataSet.Tables[1].Rows[1][0] value is : +2+ +System.Data.DataSet.Tables[1].Rows[2][0] value is : +3+ +System.Data.DataSet.Tables[1].Rows[3][0] value is : +4+ +System.Data.DataSet.Tables[1].Rows[4][0]

问题 Basically, I have a gene dataset in which the rows are genes and columns are sequential time points of protein folding. I need a function to filter genes of a certain threshold value from others across the entire data set, not just for certain vectors. For example: alpha98 alpha105 alpha112 alpha119 YAL002W 0.22 0.58 -0.36 0.13 YAL003W 0.05 0.55 -0.08 0.33 Any help would be great. 回答1: R is vectorized and R recycles. That means, that generally, something as simple as myDF > threshold will get

问题 I need to change the format of the default tooltip in the bars drawn in the plot of a chart. I don't know if my direction of looking at the problem is right. I am looking at the default format for the class StandardCategoryToolTipGenerator that is DEFAULT_TOOL_TIP_FORMAT_STRING = "({0}, {1}) = {2}" How can I redefine this value? Thanks in advance. 回答1: The StandardCategoryToolTipGenerator sets the MessageFormat ArgumentIndex values to the series , category and value . Try this example on your