datatable merge

Today, a storage task was previously executed with multiple select statements in dataset and then stored in dataset. However, in c # moblie development, multiple Select statements cannot be executed simultaneously. Only one select table is saved to dataset once.If DataSet. table. add (tablename); is used, we can only use the Merge method in Dataset.String tb0sql = "select RateValue as MonthlyPreRate from WQtbRate_LimitedLv_MonthlyPreRate"; // monthlyp

The example is an advanced step for exporting a DataTable Excel file. In addition to the Garbled text processing mentioned in the previous article, this example also adds the function of processing multiple row headers, merging cells, and processing Garbled text file names, it should be able to meet the needs of daily development.If you don't talk much about it, go directly to the Code:[Csharp]Using System;Using System. Collections. Generic;Using Syst

Datatable1 SQL: Select distinct A. *, T. ID as serverid, B. ID as deptid ,.... Datatable2 SQL: Select distinct A. *, 0 as serverid, 32 as deptid ,... When dt1.merge (dt2) is called, merge cannot be called because the two serverid fields have different types, one int32 and one int64. You can merge them using importrow: private

First, make it clear that,Datatable does not support sorting.There is already unordered data in a datatable (DT). To sort data, I have two methods: Method 1:You can create a list to store the values of the DT primary key columns in order. Then, you can use the datatable. Merge method to create a list. Code highlight

Two structure-like DataTable merging DataTable DataTable1 = new DataTable (); DataTable DataTable2 = new DataTable (); DataTable newdatatable = Datatable1.clone (); object[] obj = new Object[newdatatable.columns.cou

Original address of this article: http://blog.csdn.net/ranbolwb/article/details/8083983, reproduced please keep this line. This example is an advanced step for exporting datatable excel. In addition to the Garbled text processing mentioned in the previous article, this example also adds the ability to process multi-row headers, merge cells, and handle Garbled text file names, it should be able to meet the n

MergeThe method is to combine two similar datatables into a datatable: // Create table 1 datatable dt1 = new datatable (); // Add dt1.columns data. add ("ID"); dt1.columns. add ("name"); dt1.columns. add ("PWD"); For (INT I = 0; I Add datatable to Dataset // Create ableabledatatable dt = new

DataTable obtains the column name DataTable and updates it to the database in batches. datatable column names I haven't written anything for a long time. I haven't worked hard on technology in the past few months. Let's talk about the usage of the recently learned DataTable, which is suitable for beginners. 1

DataTable. ImportRow () and DataTable. Rows. Add (), datatable. importrow When writing code today, ImportRow () is used to add records to the DataTable. The Code is as follows:DataTable dt = datatable; DataRow dr = dt. NewRow (); Dr ["FileName"] = fileName; Dr ["DbName"] = D

Remove duplicate data on the basis of a large DataTable, create two small DataTable respectively, save multiple database connections, improve efficiency, speed up program running, datatable updates Database DataTable tab = new DataTable (); Tab = DBUtil. GetDataSet (strCmd,

Extracted online, verified: Create a able, add column names to the table datatable, Add rows to the table datatable, and filter the contents of the table datatable.1. Create a ableDatatable dt = new datable (); // you can create a name for the table, TB2. Add a column name to the table:DT. Columns. Add ("ID", typeof (system. int32); // The type can be changed, s

Returns the able set reflection list. /// View code Converts an ilist collection class to a datatable /// View code Convert the list /// View code Reflection list

Two-way merge Insert merge in-situ merge, two-way merge sort Insert and merge The time complexity of Merge Sorting is O (nlgn), and the space complexity is O (n ); However, sorting based on a single record that is merged by two

cursor position.HasErrors gets a value that indicates whether there is an error in any row of any table of the dataset to which the table belongs.Minimumcapacity Gets or sets the initial starting size of the table. The initial starting size of the rows in the table. The default value is 50.Rows gets the collection of rows that belong to the table.TableName Gets or sets the name of the DataTable.(3) Common methodsAcceptChanges () submits all changes m

. Minimumcapacity Gets or sets the initial starting size of the table. The initial starting size of the rows in the table. The default value is 50. Rows gets the collection of rows that belong to the table. TableName Gets or sets the name of the DataTable. (3) Common methods AcceptChanges () commits any changes to the table since the last call to AcceptChanges (). BeginInit () begins initializing a DataTable