gridview 放在ContentPlaceHolder下，為什麼點擊編輯後的修改，再單擊更新後，連Gridview都不顯示了。而單獨頁面就沒有任何問題
前台：
<%@ Page Title="MastPage" Language="vb" AutoEventWireup="false" MasterPageFile="~/Site1.Master" CodeBehind="Custmor.aspx.vb" Inherits="CRM_Seetop.Custmor" %>
<asp:Panel ID="Panel1" runat="server" Visible="True">
<div style="height:30px;text-align:center ">
<span style="color: #FF3300">簽約客戶</span> <span style="color: #0033CC">管理</span>系統！
</div>
<div>
<asp:GridView ID="gvCustmor" runat="server" AutoGenerateColumns="False" DataKeyNames="KID" BackColor="White"
BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px" CellPadding="4"
onpageindexchanging="gvCustmor_PageIndexChanging"
onrowcancelingedit="gvCustmor_RowCancelingEdit"
onrowdatabound="gvCustmor_RowDataBound" onrowdeleting="gvCustmor_RowDeleting"
onrowediting="gvCustmor_RowEditing" onrowupdating="gvCustmor_RowUpdating"
onsorting="gvCustmor_Sorting">
<RowStyle BackColor="White" ForeColor="#003399" />
<Columns>
<asp:CommandField HeaderText="編輯" ShowEditButton="True" />
<asp:CommandField HeaderText="刪除" ShowDeleteButton="True" />
<asp:BoundField DataField="KID" HeaderText="KID" ReadOnly="True"
SortExpression="KID" />
<asp:TemplateField HeaderText="簡稱" SortExpression="簡稱">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("簡稱")%>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("簡稱")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="ComAbbr" SortExpression="ComAbbr">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("ComAbbr")%>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("ComAbbr")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#99CCCC" ForeColor="#003399" />
<PagerStyle BackColor="#99CCCC" ForeColor="#003399" HorizontalAlign="Left" />
<SelectedRowStyle BackColor="#009999" Font-Bold="True" ForeColor="#CCFF99" />
<HeaderStyle BackColor="#003399" Font-Bold="True" ForeColor="#CCCCFF" />
</asp:GridView>
</div>
/asp:Content
後台代碼：
Imports System.Data.SqlClient
Public Class Custmor
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
gvCustmor.AllowPaging = True
gvCustmor.PageSize = 15
gvCustmor.AllowSorting = True
ViewState("SortExpression") = "KID ASC"
' Populate the GridView.
bind()
End If
End Sub
Public Sub bind()
Using conn As New SqlConnection(ConfigurationManager.ConnectionStrings("ApplicationServices").ToString())
' Create a DataSet object.
Dim dsCustmor As New DataSet()
Dim uN As String = ""
If Session("username") Is Nothing Then
uN = Page.User.Identity.Name
Else
uN = Session("username")
End If
Dim strSelectCmd As String = "SELECT KID,簡稱,ComAbbr,公司名稱,CompanyName,Web,總機電話,直線電話,公司傳真,產品分類,保護狀態 FROM kData WHERE (負責業務='" + uN + "')"
Dim da As New SqlDataAdapter(strSelectCmd, conn)
conn.Open()
da.Fill(dsCustmor, "Custmor")
Dim dvCustmor As DataView = dsCustmor.Tables("Custmor").DefaultView
dvCustmor.Sort = ViewState("SortExpression").ToString()
gvCustmor.DataSource = dvCustmor
gvCustmor.DataBind()
End Using
End Sub
Protected Sub gvCustmor_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
' Make sure the current GridViewRow is a data row.
If e.Row.RowType = DataControlRowType.DataRow Then
If e.Row.RowState = DataControlRowState.Normal OrElse e.Row.RowState = DataControlRowState.Alternate Then
' Add client-side confirmation when deleting.
DirectCast(e.Row.Cells(1).Controls(0), LinkButton).Attributes("onclick") = "if(!confirm('Are you certain you want to delete this person ?')) return false;"
End If
End If
If gvCustmor.Visible = False Then
Panel1.Visible = True
gvCustmor.Visible = True
End If
End Sub
Protected Sub gvCustmor_PageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs)
gvCustmor.PageIndex = e.NewPageIndex
bind()
End Sub
Protected Sub gvCustmor_RowEditing(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
gvCustmor.EditIndex = e.NewEditIndex
bind()
End Sub
Protected Sub gvCustmor_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs)
gvCustmor.EditIndex = -1
bind()
End Sub
Protected Sub gvCustmor_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
Using conn As New SqlConnection(ConfigurationManager.ConnectionStrings("SQLServer2005DBConnectionString").ToString())
Dim cmd As New SqlCommand()
cmd.Connection = conn
cmd.CommandText = "UPDATE kData SET 簡稱 = @LastName, ComAbbr = @FirstName WHERE KID = @KID"
cmd.CommandType = CommandType.Text
Dim strKID As String = gvCustmor.Rows(e.RowIndex).Cells(2).Text
Dim strLastName As String = DirectCast(gvCustmor.Rows(e.RowIndex).FindControl("TextBox1"), TextBox).Text
Dim strFirstName As String = DirectCast(gvCustmor.Rows(e.RowIndex).FindControl("TextBox2"), TextBox).Text
cmd.Parameters.Add("@KID", SqlDbType.Int).Value = strKID
cmd.Parameters.Add("@LastName", SqlDbType.NVarChar, 50).Value = strLastName
cmd.Parameters.Add("@FirstName", SqlDbType.NVarChar, 50).Value = strFirstName
conn.Open()
cmd.ExecuteNonQuery()
End Using
gvCustmor.EditIndex = -1
bind()
lbtnAdd.Visible = True
End Sub
Protected Sub gvCustmor_RowDeleting(ByVal sender As Object, ByVal e As GridViewDeleteEventArgs)
Using conn As New SqlConnection(ConfigurationManager.ConnectionStrings("SQLServer2005DBConnectionString").ToString())
' Create a command object.
Dim cmd As New SqlCommand()
' Assign the connection to the command.
cmd.Connection = conn
cmd.CommandText = "DELETE FROM Kdata WHERE KID = @KID"
cmd.CommandType = CommandType.Text
Dim strKID As String = gvCustmor.Rows(e.RowIndex).Cells(2).Text
cmd.Parameters.Add("@KID", SqlDbType.Int).Value = strKID
' Open the connection.
conn.Open()
' Execute the command.
cmd.ExecuteNonQuery()
End Using
gvCustmor.EditIndex = -1
' Rebind the GridView control to show data after deleting.
bind()
End Sub
' GridView.Sorting Event
Protected Sub gvCustmor_Sorting(ByVal sender As Object, ByVal e As GridViewSortEventArgs)
Dim strSortExpression As String() = ViewState("SortExpression").ToString().Split(" "c)
' If the sorting column is the same as the previous one,
' then change the sort order.
If strSortExpression(0) = e.SortExpression Then
If strSortExpression(1) = "ASC" Then
ViewState("SortExpression") = Convert.ToString(e.SortExpression) & " " & "DESC"
Else
ViewState("SortExpression") = Convert.ToString(e.SortExpression) & " " & "ASC"
End If
Else
' If sorting column is another column,
' then specify the sort order to "Ascending".
ViewState("SortExpression") = Convert.ToString(e.SortExpression) & " " & "ASC"
End If
' Rebind the GridView control to show sorted data.
bind()
End Sub
End Class
問題找到了：
GridView的EnableViewState屬性設置為false，GridView的一些事件就不會執行，比如romcommand事件 rowupdating事件等
本文來自：讀書人網(http://www.reader8.cn/)原文鏈接：http://www.reader8.cn/jiaocheng/20120316/1615649.html
