ButtonFieldBase.ValidationGroup Egenskap
Definition
Viktigt
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Hämtar eller anger namnet på gruppen med verifieringskontroller för att verifiera när en knapp i ett ButtonFieldBase objekt klickas.
public:
virtual property System::String ^ ValidationGroup { System::String ^ get(); void set(System::String ^ value); };public virtual string ValidationGroup { get; set; }member this.ValidationGroup : string with get, setPublic Overridable Property ValidationGroup As StringEgenskapsvärde
Namnet på verifieringsgruppen som ska verifieras när en knapp i en ButtonFieldBase klickas. Standardvärdet är en tom sträng (""), som anger att egenskapen ValidationGroup inte har angetts.
Exempel
Följande kodexempel visar hur du använder ValidationGroup egenskapen för att ange att endast en viss grupp verifieringskontroller verifieras när en knapp klickas i objektet för ButtonField en GridView kontroll.
<%@ Page language="C#" %>
<script runat="server">
void AuthorsGridView_RowCommand(Object sender, GridViewCommandEventArgs e)
{
// If multiple ButtonField columns are used, use the
// CommandName property to determine which button was clicked.
switch(e.CommandName)
{
case "Edit":
AuthorsGridView.Columns[0].Visible = false;
AuthorsGridView.Columns[1].Visible = true;
break;
case "Update":
AuthorsGridView.Columns[0].Visible = true;
AuthorsGridView.Columns[1].Visible = false;
break;
default:
// Do nothing.
break;
}
}
void AuthorsGridView_RowUpdating (Object sender, GridViewUpdateEventArgs e)
{
// Retrieve the row being edited.
int index = AuthorsGridView.EditIndex;
GridViewRow row = AuthorsGridView.Rows[index];
// Retrieve the new value for the author's first name from the row.
// In this example, the author's first name is in the second cell
// of the row (index 1). To get the value, first retrieve the TextBox
// that contains the value.
TextBox firstNameTextBox = (TextBox)row.Cells[1].FindControl("FirstNameTextBox");
// Make sure the control was found.
String firstName = "";
if(firstNameTextBox != null)
{
firstName = firstNameTextBox.Text;
}
// Retrieve the new value for the author's last name from the row.
// In this example, the author's last name is in the third cell
// of the row (index 2).
TextBox lastNameTextBox = (TextBox)row.Cells[2].FindControl("LastNameTextBox");
String lastName = "";
if(lastNameTextBox != null)
{
lastName = lastNameTextBox.Text;
}
// Because custom TemplateField field columns are used, parameters
// are not automatically created and passed to the data source control.
// Create Parameter objects to represent the fields to update and
// add the Parameter objects to the UpdateParameters collection.
Parameter lastNameParameter = new Parameter("au_lname", TypeCode.String, lastName);
Parameter firstNameParameter = new Parameter("au_fname", TypeCode.String, firstName);
// Clear the UpdateParameters collection before adding the
// Parameter objects. Otherwise, there will be duplicate
// parameters.
AuthorsSqlDataSource.UpdateParameters.Clear();
AuthorsSqlDataSource.UpdateParameters.Add(lastNameParameter);
AuthorsSqlDataSource.UpdateParameters.Add(firstNameParameter);
}
</script>
<head runat="server">
<title>ButtonFieldBase CausesValidation Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>ButtonFieldBase CausesValidation Example</h3>
<!-- Populate the Columns collection declaratively. -->
<asp:gridview id="AuthorsGridView"
datasourceid="AuthorsSqlDataSource"
cellpadding="5"
autogeneratecolumns="false"
datakeynames="au_id"
onrowcommand="AuthorsGridView_RowCommand"
onrowupdating="AuthorsGridView_RowUpdating"
runat="server">
<columns>
<asp:buttonfield commandname="Edit"
causesvalidation="false"
text="Edit"
headertext="Edit Author">
</asp:buttonfield>
<asp:buttonfield commandname="Update"
visible="false"
causesvalidation="true"
text="Update"
validationgroup="NameGroup"
headertext="Update Author">
</asp:buttonfield>
<asp:templatefield headertext="Last Name">
<itemtemplate>
<%# Eval("au_lname") %>
</itemtemplate>
<edititemtemplate>
<asp:textbox id="LastNameTextBox"
text='<%# Eval("au_lname") %>'
width="175"
runat="server" /><br />
<asp:RequiredFieldValidator ID="LastNameRequiredValidator"
ControlToValidate="LastNameTextBox"
ErrorMessage="Please enter a last name."
ValidationGroup="NameGroup"
Runat="server" />
</edititemtemplate>
</asp:templatefield>
<asp:templatefield headertext="First Name">
<itemtemplate>
<%# Eval("au_fname") %>
</itemtemplate>
<edititemtemplate>
<asp:textbox id="FirstNameTextBox"
text='<%# Eval("au_fname") %>'
width="175"
runat="server" /><br />
<asp:RequiredFieldValidator ID="FirstNameRequiredValidator"
ControlToValidate="FirstNameTextBox"
ErrorMessage="Please enter a first name."
ValidationGroup="NameGroup"
Runat="server" />
</edititemtemplate>
</asp:templatefield>
</columns>
</asp:gridview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Pubs sample database. -->
<asp:sqldatasource id="AuthorsSqlDataSource"
selectcommand="SELECT [au_id], [au_lname], [au_fname] FROM [authors]"
updatecommand="UPDATE authors SET au_lname=@au_lname, au_fname=@au_fname WHERE (authors.au_id = @au_id)"
connectionstring="server=localhost;database=pubs;integrated security=SSPI"
runat="server">
</asp:sqldatasource>
</div>
</form>
</body>
</html>
<%@ Page language="VB" %>
<script runat="server">
Sub AuthorsGridView_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
' If multiple ButtonField columns are used, use the
' CommandName property to determine which button was clicked.
Select Case e.CommandName
Case "Edit"
AuthorsGridView.Columns(0).Visible = False
AuthorsGridView.Columns(1).Visible = True
Case "Update"
AuthorsGridView.Columns(0).Visible = True
AuthorsGridView.Columns(1).Visible = False
Case Else
' Do nothing.
End Select
End Sub
Sub AuthorsGridView_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
' Retrieve the row being edited.
Dim index As Integer = AuthorsGridView.EditIndex
Dim row As GridViewRow = AuthorsGridView.Rows(index)
' Retrieve the new value for the author's first name from the row.
' In this example, the author's first name is in the second cell
' of the row (index 1). To get the value, first retrieve the TextBox
' that contains the value.
Dim firstNameTextBox As TextBox = CType(row.Cells(1).FindControl("FirstNameTextBox"), TextBox)
' Make sure the control was found.
Dim firstName As String = ""
If Not firstNameTextBox Is Nothing Then
firstName = firstNameTextBox.Text
End If
' Retrieve the new value for the author's last name from the row.
' In this example, the author's last name is in the third cell
' of the row (index 2).
Dim lastNameTextBox As TextBox = CType(row.Cells(2).FindControl("LastNameTextBox"), TextBox)
Dim lastName As String = ""
If Not lastNameTextBox Is Nothing Then
lastName = lastNameTextBox.Text
End If
' Because custom TemplateField field columns are used, parameters
' are not automatically created and passed to the data source control.
' Create Parameter objects to represent the fields to update and
' add the Parameter objects to the UpdateParameters collection.
Dim lastNameParameter As New Parameter("au_lname", TypeCode.String, lastName)
Dim firstNameParameter As New Parameter("au_fname", TypeCode.String, firstName)
' Clear the UpdateParameters collection before adding the
' Parameter objects. Otherwise, there will be duplicate
' parameters.
AuthorsSqlDataSource.UpdateParameters.Clear()
AuthorsSqlDataSource.UpdateParameters.Add(lastNameParameter)
AuthorsSqlDataSource.UpdateParameters.Add(firstNameParameter)
End Sub
</script>
<head runat="server">
<title>ButtonFieldBase CausesValidation Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>ButtonFieldBase CausesValidation Example</h3>
<!-- Populate the Columns collection declaratively. -->
<asp:gridview id="AuthorsGridView"
datasourceid="AuthorsSqlDataSource"
cellpadding="5"
autogeneratecolumns="false"
datakeynames="au_id"
onrowcommand="AuthorsGridView_RowCommand"
onrowupdating="AuthorsGridView_RowUpdating"
runat="server">
<columns>
<asp:buttonfield commandname="Edit"
causesvalidation="false"
text="Edit"
headertext="Edit Author">
</asp:buttonfield>
<asp:buttonfield commandname="Update"
visible="false"
causesvalidation="true"
text="Update"
validationgroup="NameGroup"
headertext="Update Author">
</asp:buttonfield>
<asp:templatefield headertext="Last Name">
<itemtemplate>
<%# Eval("au_lname") %>
</itemtemplate>
<edititemtemplate>
<asp:textbox id="LastNameTextBox"
text='<%# Eval("au_lname") %>'
width="175"
runat="server" /><br />
<asp:RequiredFieldValidator ID="LastNameRequiredValidator"
ControlToValidate="LastNameTextBox"
ErrorMessage="Please enter a last name."
ValidationGroup="NameGroup"
Runat="server" />
</edititemtemplate>
</asp:templatefield>
<asp:templatefield headertext="First Name">
<itemtemplate>
<%# Eval("au_fname") %>
</itemtemplate>
<edititemtemplate>
<asp:textbox id="FirstNameTextBox"
text='<%# Eval("au_fname") %>'
width="175"
runat="server" /><br />
<asp:RequiredFieldValidator ID="FirstNameRequiredValidator"
ControlToValidate="FirstNameTextBox"
ErrorMessage="Please enter a first name."
ValidationGroup="NameGroup"
Runat="server" />
</edititemtemplate>
</asp:templatefield>
</columns>
</asp:gridview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Pubs sample database. -->
<asp:sqldatasource id="AuthorsSqlDataSource"
selectcommand="SELECT [au_id], [au_lname], [au_fname] FROM [authors]"
updatecommand="UPDATE authors SET au_lname=@au_lname, au_fname=@au_fname WHERE (authors.au_id = @au_id)"
connectionstring="server=localhost;database=pubs;integrated security=SSPI"
runat="server">
</asp:sqldatasource>
</div>
</form>
</body>
</html>
Kommentarer
Använd egenskapen ValidationGroup för att ange verifieringsgruppen för att verifiera när en knapp i ett ButtonFieldBase objekt klickas. Endast verifieringskontrollerna i den angivna verifieringsgruppen verifieras.
Note
Egenskapen CausesValidation måste anges till true för att egenskapen ValidationGroup ska ha en effekt.
Mer information om valideringsgrupper finns i BaseValidator.ValidationGroup.
Värdet för den här egenskapen lagras i visningstillstånd.
