[英]Copy rows from one Datatable to another DataTable?
How can I copy specific rows from DataTable to another Datable in c#?如何将特定行从 DataTable 复制到 c# 中的另一个 Datable? There will be more than one row.
会有不止一排。
foreach (DataRow dr in dataTable1.Rows) {
if (/* some condition */)
dataTable2.Rows.Add(dr.ItemArray);
}
The above example assumes that dataTable1
and dataTable2
have the same number, type and order of columns.上面的示例假设
dataTable1
和dataTable2
具有相同的列数、类型和顺序。
Copy Specified Rows from Table to another将指定的行从表复制到另一个
// here dttablenew is a new Table and dttableOld is table Which having the data
dttableNew = dttableOld.Clone();
foreach (DataRow drtableOld in dttableOld.Rows)
{
if (/*put some Condition */)
{
dtTableNew.ImportRow(drtableOld);
}
}
Try This试试这个
String matchString="ID0001"//assuming we have to find rows having key=ID0001
DataTable dtTarget = new DataTable();
dtTarget = dtSource.Clone();
DataRow[] rowsToCopy;
rowsToCopy = dtSource.Select("key='" + matchString + "'");
foreach (DataRow temp in rowsToCopy)
{
dtTarget.ImportRow(temp);
}
Check this out, you may like it (previously, please, clone table1 to table2):看看这个,你可能会喜欢它(以前,请把 table1 克隆到 table2):
table1.AsEnumerable().Take(recodCount).CopyToDataTable(table2,LoadOption.OverwriteChanges);
Or:或者:
table1.AsEnumerable().Where ( yourcondition ) .CopyToDataTable(table2,LoadOption.OverwriteChanges);
受以下版本支持:4、3.5 SP1,您现在可以只调用对象上的方法。
DataTable dataTable2 = dataTable1.Copy()
As a result of the other posts, this is the shortest I could get:由于其他帖子,这是我能得到的最短的:
DataTable destTable = sourceTable.Clone();
sourceTable.AsEnumerable().Where(row => /* condition */ ).ToList().ForEach(row => destTable.ImportRow(row));
below sample would be the fastest way to copy one row.下面的示例将是复制一行的最快方法。 each cell is being copied based on the column name.
每个单元格都根据列名进行复制。 in case you dont need a specific cell to copy then have a try catch or add if.
如果您不需要特定的单元格进行复制,请尝试捕获或添加 if。 if your going to copy more than 1 row then loop the code below.
如果您要复制超过 1 行,则循环下面的代码。
DataRow dr = dataset1.Tables[0].NewRow();
for (int i = 0; i < dataset1.Tables[1].Columns.Count; i++)
{
dr[dataset1.Tables[1].Columns[i].ColumnName] = dataset1.Tables[1].Rows[0][i];
}
datasetReport.Tables[0].Rows.Add(dr);
dataset1.Tables[1].Rows[ 0 ][i]; dataset1.Tables[1].Rows[ 0 ][i]; change the index 0 to your specified row index or you can use a variable if your going to loop or if its going to be logical
将索引 0 更改为您指定的行索引,或者如果您要循环或者它是合乎逻辑的,则可以使用变量
I've created an easy way to do this issue我创建了一个简单的方法来解决这个问题
DataTable newTable = oldtable.Clone();
for (int i = 0; i < oldtable.Rows.Count; i++)
{
DataRow drNew = newTable.NewRow();
drNew.ItemArray = oldtable.Rows[i].ItemArray;
newTable.Rows.Add(drNew);
}
private void CopyDataTable(DataTable table){
// Create an object variable for the copy.
DataTable copyDataTable;
copyDataTable = table.Copy();
// Insert code to work with the copy.
}
For those who want single command SQL query for that:对于那些想要单个命令 SQL 查询的人:
INSERT INTO TABLE002
(COL001_MEM_ID, COL002_MEM_NAME, COL002_MEM_ADD, COL002_CREATE_USER_C, COL002_CREATE_S)
SELECT COL001_MEM_ID, COL001_MEM_NAME, COL001_MEM_ADD, COL001_CREATE_USER_C, COL001_CREATE_S
FROM TABLE001;
This query will copy data from TABLE001
to TABLE002
and we assume that both columns had different column names.此查询会将数据从
TABLE001
复制到TABLE002
,我们假设两列具有不同的列名。
Column names are mapped one-to-one like:列名是一对一映射的,例如:
COL001_MEM_ID -> COL001_MEM_ID COL001_MEM_ID -> COL001_MEM_ID
COL001_MEM_NAME -> COL002_MEM_NAME COL001_MEM_NAME -> COL002_MEM_NAME
COL001_MEM_ADD -> COL002_MEM_ADD COL001_MEM_ADD -> COL002_MEM_ADD
COL001_CREATE_USER_C -> COL002_CREATE_USER_C COL001_CREATE_USER_C -> COL002_CREATE_USER_C
COL002_CREATE_S -> COL002_CREATE_S COL002_CREATE_S -> COL002_CREATE_S
You can also specify where clause, if you need some condition.如果需要某些条件,您还可以指定 where 子句。
To copy whole datatable just do this:要复制整个数据表,只需执行以下操作:
DataGridView sourceGrid = this.dataGridView1;
DataGridView targetGrid = this.dataGridView2;
targetGrid.DataSource = sourceGrid.DataSource;
There is better way to do this.有更好的方法来做到这一点。
DataTable targetDataTable = new DataTable(); DataTable targetDataTable = new DataTable(); targetDataTable = changedColumnMetadata.AsEnumerable().Where(dataRow => entityName.Equals(dataRow["EntityName"])).CopyToDataTable();
targetDataTable = changedColumnMetadata.AsEnumerable().Where(dataRow => entityName.Equals(dataRow["EntityName"])).CopyToDataTable();
Please try this and let me know in case of any issues.请试试这个,如果有任何问题,请告诉我。
You can do it calling the DataTable.Copy() method, for example:您可以通过调用DataTable.Copy()方法来实现,例如:
DataSet ds = new DataSet();
System.Data.DataTable dt = new System.Data.DataTable();
dt = _BOSearchView.DS.Tables[BusLib.TPV.TableName.SearchView].Copy();
ds.Tables.Add(dt);
UltGrdSaleExcel.SetDataBinding(ds, dt.TableName, true);
Not that anyone is still reading this thread by now but...并不是说现在还有人在阅读这个帖子,但是......
I needed to copy rows from multiple tables with the same structure into a new table to be used as a datasource for datagridview:我需要将具有相同结构的多个表中的行复制到一个新表中,以用作 datagridview 的数据源:
// Generate DataTable[] alltables from multiple datatables
DataTable newTable = alltables[0].Clone();
foreach (DataTable dt in alltables)
{
for (int i = 0; i < dt.Rows.Count; i++)
newTable.Rows.Add(dt.Rows[i].ItemArray);
}
//use Merge
//this will append all rows of newDataTable with oldDateTale
oldDateTale.Merge(newDataTable);
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