DataTable 建構函式
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
初始化 DataTable 類別的新執行個體。
多載
| 名稱 | Description |
|---|---|
| DataTable() |
初始化一個無參數的新類別實例 DataTable 。 |
| DataTable(String) |
初始化一個以指定資料表名稱的新 DataTable 類別實例。 |
| DataTable(SerializationInfo, StreamingContext) |
已淘汰.
初始化一個新的類別實例 DataTable ,並使用序列化資料。 |
| DataTable(String, String) |
使用指定的資料表名稱與命名空間初始化該類別的新實例 DataTable 。 |
DataTable()
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
初始化一個無參數的新類別實例 DataTable 。
public:
DataTable();
public DataTable();
Public Sub New ()
範例
以下範例將建立 DataTable 一個新節點,且 為 DataColumnDataRow,並在控制 DataGridView 項中顯示。
private void MakeDataTableAndDisplay()
{
// Create new DataTable.
DataTable table = new DataTable();
// 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;
}
Private Sub MakeDataTableAndDisplay()
' Create new DataTable.
Dim table As New DataTable
' Declare DataColumn and DataRow variables.
Dim column As DataColumn
Dim row As DataRow
' 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.
Dim i As Integer
For i = 0 To 10
row = table.NewRow
row("id") = i
row("item") = "item " & i
table.Rows.Add(row)
Next i
' Set to DataGrid.DataSource property to the table.
DataGrid1.DataSource = table
End Sub
備註
建構子會為物件的所有屬性 DataTable 設定初始值。 下表顯示屬性及其預設值。 當建立 的 DataTable 實例時,以下的讀寫屬性會被設定為初始值。
| 房產 | 預設值 |
|---|---|
| CaseSensitive | 如果屬於某個家長 DataSet,這也是同樣的。 否則為 false。 |
| DisplayExpression | 空字串(“”) |
| Locale | 與父 DataSet 物件 CultureInfo 的物件相同(由 Locale 屬性回傳);若不存在父物件,預設為目前系統 CultureInfo。 |
| 最小容量 | 50排。 |
你可以透過單獨呼叫這些屬性來更改這些屬性的值。
另請參閱
適用於
DataTable(String)
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
初始化一個以指定資料表名稱的新 DataTable 類別實例。
public:
DataTable(System::String ^ tableName);
public DataTable(string? tableName);
public DataTable(string tableName);
new System.Data.DataTable : string -> System.Data.DataTable
Public Sub New (tableName As String)
參數
- tableName
- String
給桌子的名字。 若 tableName 是 null 空字串,加入 DataTableCollection後會給出預設名稱。
範例
以下範例建立 並 DataTable 顯示在控制 DataGridView 項中。
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;
}
Private Sub MakeDataTableAndDisplay()
' Create new DataTable.
Dim table As New DataTable("table")
' Declare DataColumn and DataRow variables.
Dim column As DataColumn
Dim row As DataRow
' 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.
Dim i As Integer
For i = 0 To 10
row = table.NewRow
row("id") = i
row("item") = "item " & i
table.Rows.Add(row)
Next i
' Set to DataGrid.DataSource property to the table.
DataGrid1.DataSource = table
End Sub
另請參閱
適用於
DataTable(SerializationInfo, StreamingContext)
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
警告
This API supports obsolete formatter-based serialization. It should not be called or extended by application code.
初始化一個新的類別實例 DataTable ,並使用序列化資料。
protected:
DataTable(System::Runtime::Serialization::SerializationInfo ^ info, System::Runtime::Serialization::StreamingContext context);
[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
[System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
protected DataTable(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
protected DataTable(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
protected DataTable(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
[System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
protected DataTable(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
[<System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
new System.Data.DataTable : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Data.DataTable
new System.Data.DataTable : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Data.DataTable
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
new System.Data.DataTable : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Data.DataTable
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
[<System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
new System.Data.DataTable : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Data.DataTable
Protected Sub New (info As SerializationInfo, context As StreamingContext)
參數
- info
- SerializationInfo
資料集的序列化資料。
- context
- StreamingContext
關於序列化串流的上下文資訊。
- 屬性
例外狀況
僅 .NET 7 及更新版本: info 包含二進位資料。
備註
此建構子實作DataTable是 的必要條件。ISerializable
另請參閱
適用於
DataTable(String, String)
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
- 來源:
- DataTable.cs
使用指定的資料表名稱與命名空間初始化該類別的新實例 DataTable 。
public:
DataTable(System::String ^ tableName, System::String ^ tableNamespace);
public DataTable(string? tableName, string? tableNamespace);
public DataTable(string tableName, string tableNamespace);
new System.Data.DataTable : string * string -> System.Data.DataTable
Public Sub New (tableName As String, tableNamespace As String)
參數
- tableName
- String
給桌子的名字。 若 tableName 是 null 空字串,加入 DataTableCollection後會給出預設名稱。
- tableNamespace
- String
儲存在 DataTable.