ObjectDataSourceView.UpdateParameters プロパティ
アセンブリ: System.Web (system.web.dll 内)

Dim instance As ObjectDataSourceView Dim value As ParameterCollection value = instance.UpdateParameters
UpdateMethod プロパティによって使用されるパラメータを格納している ParameterCollection。

UpdateParameters コレクションに格納されているパラメータと UpdateMethod プロパティ シグネチャで指定されたメソッド内のパラメータは、名前と型が一致している必要があります。パラメータ名は OldValuesParameterFormatString プロパティの影響を受け、大文字と小文字が区別されます。GridView や DetailsView などのパラメータを提供するデータ バインド コントロールを使用する場合、ObjectDataSource コントロールは、コレクションで明示的に指定されたすべてのパラメータと、データ バインド コントロールによって提供されるパラメータとを自動的にマージします。詳細については、ObjectDataSource.UpdateMethod のトピックを参照してください。

DropDownList コントロール、TextBox コントロール、および複数の ObjectDataSource コントロールを使用してデータを更新する方法を次のコード例に示します。TextBox コントロールがアドレス情報の入力と更新に使用されるのに対し、DropDownList は、NorthwindEmployee の名前を表示します。UpdateParameters コレクションには、DropDownList で選択された値に関連付けられた ControlParameter オブジェクトが格納されているため、Update 操作を発生させるボタンは、従業員を選択するまで有効になりません。
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB" Assembly="Samples.AspNet.VB" %> <%@ Page language="vb" %> <%@ Import namespace="Samples.AspNet.VB" %> <Script runat="server"> ' Add parameters and initialize the user interface ' only if an employee is selected. Private Sub Page_Load(sender As Object, e As EventArgs) ' Be sure the text boxes are initialized with ' data from the currently selected employee. Dim selectedEmployee As NorthwindEmployee selectedEmployee = EmployeeLogic.GetEmployee(DropDownList1.SelectedValue) If Not selectedEmployee Is Nothing Then AddressBox.Text = selectedEmployee.Address CityBox.Text = selectedEmployee.City PostalCodeBox.Text = selectedEmployee.PostalCode Button1.Enabled = True Else Button1.Enabled = False End If End Sub ' Page_Load ' Press the button to update. Private Sub Btn_UpdateEmployee (sender As Object, e As CommandEventArgs ) ObjectDataSource2.Update() End Sub ' Btn_UpdateEmployee </Script> <html> <head> <title>ObjectDataSource - VB Example</title> </head> <body> <form id="Form1" method="post" runat="server"> <!-- The DropDownList is bound to the first ObjectDataSource. --> <asp:objectdatasource id="ObjectDataSource1" runat="server" selectmethod="GetAllEmployees" typename="Samples.AspNet.VB.EmployeeLogic" /> <p><asp:dropdownlist id="DropDownList1" runat="server" datasourceid="ObjectDataSource1" datatextfield="FullName" datavaluefield="EmpID" autopostback="True" /></p> <!-- The second ObjectDataSource performs the Update. This preserves the state of the DropDownList, which otherwise would rebind when the DataSourceChanged event is raised as a result of an Update operation. --> <!-- Security Note: The ObjectDataSource uses a FormParameter, Security Note: which does not perform validation of input from the client. Security Note: To validate the value of the FormParameter, Security Note: handle the Updating event. --> <asp:objectdatasource id="ObjectDataSource2" runat="server" updatemethod="UpdateEmployeeWrapper" typename="Samples.AspNet.VB.EmployeeLogic"> <updateparameters> <asp:controlparameter name="anID" controlid="DropDownList1" propertyname="SelectedValue" /> <asp:formparameter name="anAddress" formfield="AddressBox" /> <asp:formparameter name="aCity" formfield="CityBox" /> <asp:formparameter name="aPostalCode" formfield="PostalCodeBox" /> </updateparameters> </asp:objectdatasource> <p><asp:textbox id="AddressBox" runat="server" /></p> <p><asp:textbox id="CityBox" runat="server" /></p> <p><asp:textbox id="PostalCodeBox" runat="server" /></p> <asp:button id="Button1" runat="server" text="Update Employee" oncommand="Btn_UpdateEmployee" /> </form> </body> </html>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS" Assembly="Samples.AspNet.CS" %> <%@ Page language="c#" %> <%@ Import namespace="Samples.AspNet.CS" %> <Script runat="server"> // Add parameters and initialize the user interface // only if an employee is selected. private void Page_Load(object sender, EventArgs e) { // Be sure the text boxes are initialized with // data from the currently selected employee. NorthwindEmployee selectedEmployee = EmployeeLogic.GetEmployee(DropDownList1.SelectedValue); if (selectedEmployee != null) { AddressBox.Text = selectedEmployee.Address; CityBox.Text = selectedEmployee.City; PostalCodeBox.Text = selectedEmployee.PostalCode; Button1.Enabled = true; } else { Button1.Enabled = false; } } // Press the button to update. private void Btn_UpdateEmployee (object sender, CommandEventArgs e) { ObjectDataSource2.Update(); } </Script> <html> <head> <title>ObjectDataSource - C# Example</title> </head> <body> <form id="Form1" method="post" runat="server"> <!-- The DropDownList is bound to the first ObjectDataSource. --> <asp:objectdatasource id="ObjectDataSource1" runat="server" selectmethod="GetAllEmployees" typename="Samples.AspNet.CS.EmployeeLogic" /> <p><asp:dropdownlist id="DropDownList1" runat="server" datasourceid="ObjectDataSource1" datatextfield="FullName" datavaluefield="EmpID" autopostback="True" /></p> <!-- The second ObjectDataSource performs the Update. This preserves the state of the DropDownList, which otherwise would rebind when the DataSourceChanged event is raised as a result of an Update operation. --> <!-- Security Note: The ObjectDataSource uses a FormParameter, Security Note: which does not perform validation of input from the client. Security Note: To validate the value of the FormParameter, Security Note: handle the Updating event. --> <asp:objectdatasource id="ObjectDataSource2" runat="server" updatemethod="UpdateEmployeeWrapper" typename="Samples.AspNet.CS.EmployeeLogic"> <updateparameters> <asp:controlparameter name="anID" controlid="DropDownList1" propertyname="SelectedValue" /> <asp:formparameter name="anAddress" formfield="AddressBox" /> <asp:formparameter name="aCity" formfield="CityBox" /> <asp:formparameter name="aPostalCode" formfield="PostalCodeBox" /> </updateparameters> </asp:objectdatasource> <p><asp:textbox id="AddressBox" runat="server" /></p> <p><asp:textbox id="CityBox" runat="server" /></p> <p><asp:textbox id="PostalCodeBox" runat="server" /></p> <asp:button id="Button1" runat="server" text="Update Employee" oncommand="Btn_UpdateEmployee" /> </form> </body> </html>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL" Assembly="Samples.AspNet.JSL" %> <%@ Page language="VJ#" %> <%@ Import namespace="Samples.AspNet.JSL" %> <Script runat="server"> // Add parameters and initialize the user interface // only if an employee is selected. private void Page_Load(Object sender, EventArgs e) throws NorthwindDataException { // Be sure the text boxes are initialized with // data from the currently selected employee. NorthwindEmployee selectedEmployee = EmployeeLogic.GetEmployee(DropDownList1.get_SelectedValue()); if (selectedEmployee != null) { AddressBox.set_Text(selectedEmployee.get_Address()); CityBox.set_Text(selectedEmployee.get_City()); PostalCodeBox.set_Text(selectedEmployee.get_PostalCode()); Button1.set_Enabled(true); } else { Button1.set_Enabled(false); } } //Page_Load // Press the button to update. private void Btn_UpdateEmployee(Object sender, CommandEventArgs e) { ObjectDataSource2.Update(); } //Btn_UpdateEmployee </Script> <html> <head> <title>ObjectDataSource - VJ# Example</title> </head> <body> <form id="Form1" method="post" runat="server"> <!-- The DropDownList is bound to the first ObjectDataSource. --> <asp:objectdatasource id="ObjectDataSource1" runat="server" selectmethod="GetAllEmployees" typename="Samples.AspNet.JSL.EmployeeLogic" /> <p><asp:dropdownlist id="DropDownList1" runat="server" datasourceid="ObjectDataSource1" datatextfield="FullName" datavaluefield="EmpID" autopostback="True" /></p> <!-- The second ObjectDataSource performs the Update. This preserves the state of the DropDownList, which otherwise would rebind when the DataSourceChanged event is raised as a result of an Update operation. --> <asp:objectdatasource id="ObjectDataSource2" runat="server" updatemethod="UpdateEmployeeWrapper" typename="Samples.AspNet.JSL.EmployeeLogic"> <updateparameters> <asp:controlparameter name="anID" controlid="DropDownList1" propertyname="SelectedValue" /> <asp:formparameter name="anAddress" formfield="AddressBox" /> <asp:formparameter name="aCity" formfield="CityBox" /> <asp:formparameter name="aPostalCode" formfield="PostalCodeBox" /> </updateparameters> </asp:objectdatasource> <p><asp:textbox id="AddressBox" runat="server" /></p> <p><asp:textbox id="CityBox" runat="server" /></p> <p><asp:textbox id="PostalCodeBox" runat="server" /></p> <asp:button id="Button1" runat="server" text="Update Employee" oncommand="Btn_UpdateEmployee" /> </form> </body> </html>

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