创建 DataTable
记录一下 基础知识
DataTable dt = new DataTable();
dt.Columns.Add("Name");
dt.Columns.Add("Value");
DataRow dr;
dr = dt.NewRow();
dr["Name"] = "Ntext2";
dr["Value"] = "TesrNtext2";
dt.Rows.Add(dr);
dt.Columns.Add("Name");
dt.Columns.Add("Value");
DataRow dr;
dr = dt.NewRow();
dr["Name"] = "Ntext2";
dr["Value"] = "TesrNtext2";
dt.Rows.Add(dr);
private void MakeDataTableAndDisplay()
{
// Create new DataTable.
DataTable table = new DataTable("table");
// Declare DataColumn and DataRow variables.
DataColumn column;
DataRow row;
// Create new DataColumn, set DataType,
// ColumnName and add to DataTable.
column = new DataColumn();
column.DataType = System.Type.GetType("System.Int32");
column.ColumnName = "id";
table.Columns.Add(column);
// Create second column.
column = new DataColumn();
column.DataType = Type.GetType("System.String");
column.ColumnName = "item";
table.Columns.Add(column);
// Create new DataRow objects and add to DataTable.
for(int i = 0; i < 10; i++)
{
row = table.NewRow();
row["id"] = i;
row["item"] = "item " + i;
table.Rows.Add(row);
}
// Set to DataGrid.DataSource property to the table.
dataGrid1.DataSource = table;
}
{
// Create new DataTable.
DataTable table = new DataTable("table");
// Declare DataColumn and DataRow variables.
DataColumn column;
DataRow row;
// Create new DataColumn, set DataType,
// ColumnName and add to DataTable.
column = new DataColumn();
column.DataType = System.Type.GetType("System.Int32");
column.ColumnName = "id";
table.Columns.Add(column);
// Create second column.
column = new DataColumn();
column.DataType = Type.GetType("System.String");
column.ColumnName = "item";
table.Columns.Add(column);
// Create new DataRow objects and add to DataTable.
for(int i = 0; i < 10; i++)
{
row = table.NewRow();
row["id"] = i;
row["item"] = "item " + i;
table.Rows.Add(row);
}
// Set to DataGrid.DataSource property to the table.
dataGrid1.DataSource = table;
}
将 DataTable 保存到 DataSet 中所需的 C# 代码:void DataTableToDataSet(DataTable dt)
{
// Duplicate the table and add it to a DataSet
DataSet dsTmp = new DataSet();
DataTable dtTmp = dt.Copy();
dsTmp.Tables.Add(dtTmp);
}
将DataView保存到DataSet中:void DataViewToDataSet(DataView dv)
{
// Clone the structure of the table behind the view
DataTable dtTemp = dv.Table.Clone();
dtTemp.TableName = "Row";
// Populate the table with rows in the view
foreach(DataRowView drv in dv)
dtTemp.ImportRow(drv.Row);
DataSet dsTemp = new DataSet(dv.Table.TableName);
// Add the new table to a DataSet
dsTemp.Tables.Add(dtTemp);
}
{
// Duplicate the table and add it to a DataSet
DataSet dsTmp = new DataSet();
DataTable dtTmp = dt.Copy();
dsTmp.Tables.Add(dtTmp);
}
将DataView保存到DataSet中:void DataViewToDataSet(DataView dv)
{
// Clone the structure of the table behind the view
DataTable dtTemp = dv.Table.Clone();
dtTemp.TableName = "Row";
// Populate the table with rows in the view
foreach(DataRowView drv in dv)
dtTemp.ImportRow(drv.Row);
DataSet dsTemp = new DataSet(dv.Table.TableName);
// Add the new table to a DataSet
dsTemp.Tables.Add(dtTemp);
}