是否有人能够理解为什么我会收到此错误？
Uncaught Sys.WebForms.PageRequestManagerServerErrorException：Sys.WebForms.PageRequestManagerServerErrorException：对象引用未设置为对象的实例。
SOURCE：ScriptResource.axd
所以这就是......
首次点击时（首次访问网站后）我有一个按钮，但之后我总是收到错误。我尝试通过在Page_Load事件的第一行放置调试点来调试主题，但它甚至没有到达那里。
错误显示在那个由javascript构成的ScriptResources.axd文件之前，所以我试图调试它，但我真的不明白发生了什么，所以我找不到问题。
从我可以理解的，不知何故，当我第一次点击按钮时，我不能初始化一些控件我应该，但我只是想不出来。
按钮id = btnFiltra
HTML
<body>
<form id="form1" runat="server">
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager>
<script type="text/javascript">
Sys.Application.add_load(onPageLoad);
</script>
<asp:Panel runat="server" ID="pHeader" CssClass="PVHeaderBackground">
<img alt="Planview" src="Images/logo_planview.png" class="PVLogoBackImgleft"/>
<div id="PTLogo" class="PTLogosRight">
<img src="Images/logo_meo_preto.png" alt="Meo" style="vertical-align:middle; margin-top:auto; margin-bottom:auto"/>
<img src="Images/Ptlogo.jpg" alt="PT" style="height:50px; width:auto; margin-left:10px; vertical-align:middle;margin-top:auto; margin-bottom:auto"/>
</div>
</asp:Panel>
<asp:UpdatePanel ID="upBody" runat="server" UpdateMode="Conditional" >
<ContentTemplate>
<asp:Panel runat="server" ID="pOpcoesGlobais" >
<asp:Button ID="btnExtrair" runat="server" OnClientClick="umProjetoApenas()" OnClick="btnExtrair_OnClick" Text="Extrair Dados"/>
<asp:Button ID="btnAtualizar" runat="server" OnClientClick="umProjetoApenas()" OnClick="btnAtualizar_OnClick" Text="Atualizar Dados"/>
</asp:Panel>
<asp:Panel runat="server" ID="pTarefaOkFaturar" Visible="true" style="display:none;" Width="100%" Height="100%" >
<div style="width:100%; height:10%">
<b>Ao confirmar que a tarefa pode ser faturada, todas as parcelas sem documento passarão a ser faturadas de forma automática.</b>
</div>
<div style="width:100%;">
<asp:GridView runat="server" ID="gvCheckParcelas" CssClass="PVPortlet"></asp:GridView>
</div>
<div style="width:100%;position: absolute;bottom: 10px;">
<asp:Button ID="btnOkFaturarCancelar" runat="server" Text="Cancelar" OnClick="btnOkFaturarCancelar_OnClick" style="float:left;margin-left: 10px;"/>
<asp:Button ID="btnOkFaturarOk" runat="server" Text="Concordo" OnClick="btnOkFaturarOk_OnClick" style="float:right;margin-right: 10px;" />
</div>
</asp:Panel>
<asp:Panel runat="server" ID="pBody">
<asp:UpdatePanel ID="upFiltros" runat="server">
<ContentTemplate>
<asp:Label ID="lCliente" runat="server" Text="Cliente"/>
<asp:TextBox ID="txbCliente" runat="server"/>
<asp:PopupControlExtender ID="txbCliente_PopupControlExtender" runat="server" Enabled="True" ExtenderControlID="" TargetControlID="txbCliente"
PopupControlID="pPopUpCliente" Position="Bottom" >
</asp:PopupControlExtender>
<asp:Panel ID="pPopUpCliente" runat="server" Height="116px" BorderStyle="Solid" BorderWidth="2px" Direction="LeftToRight" ScrollBars="Auto" BackColor="#CCCCCC" Style="display: none" >
<asp:CheckBoxList ID="cblCliente" runat="server" DataTextField="DESCRICAO" onChange="uncheckOnTodos(this)" DataValueField="ID" AutoPostBack="False" AppendDataBoundItems="True">
<asp:ListItem Text="Todos" Value="all" Selected="False"></asp:ListItem>
</asp:CheckBoxList>
</asp:Panel>
<asp:Label ID="lPedido" runat="server" Text="Pedido"/>
<asp:TextBox ID="txbPedido" runat="server"/>
<asp:PopupControlExtender ID="txbPedido_PopupControlExtender" runat="server"
Enabled="True" ExtenderControlID="" TargetControlID="txbPedido"
PopupControlID="pPopUpPedido" Position="Bottom" >
</asp:PopupControlExtender>
<asp:Panel ID="pPopUpPedido" runat="server" Height="116px"
BorderStyle="Solid" BorderWidth="2px" Direction="LeftToRight"
ScrollBars="Auto" BackColor="#CCCCCC" Style="display: none" >
<asp:CheckBoxList ID="cblPedido" runat="server"
DataTextField="DESCRICAO" onChange="uncheckOnTodos(this)"
DataValueField="ID" AutoPostBack="False" AppendDataBoundItems="True">
<asp:ListItem Text="Todos" Value="all" Selected="False"></asp:ListItem>
</asp:CheckBoxList>
</asp:Panel>
<asp:Label ID="lProjeto" runat="server" Text="Projeto"/>
<asp:TextBox ID="txbProjeto" runat="server"/>
<asp:PopupControlExtender ID="txbProjeto_PopupControlExtender" runat="server"
Enabled="True" ExtenderControlID="" TargetControlID="txbProjeto"
PopupControlID="pPopUpProjeto" Position="Bottom" >
</asp:PopupControlExtender>
<asp:Panel ID="pPopUpProjeto" runat="server" Height="116px"
BorderStyle="Solid" BorderWidth="2px" Direction="LeftToRight" ScrollBars="Auto" BackColor="#CCCCCC" Style="display: none" >
<asp:CheckBoxList ID="cblProjeto" runat="server"
DataTextField="DESCRICAO" onChange="uncheckOnTodos(this)"
DataValueField="ID" AutoPostBack="False" AppendDataBoundItems="True">
<asp:ListItem Text="Todos" Value="all" Selected="False"></asp:ListItem>
</asp:CheckBoxList>
</asp:Panel>
<asp:Button runat="server" ID="btnFiltra" Text="Pesquisar"
onclick="btnFiltra_Click"/>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="uprgTarefas" runat="server" AssociatedUpdatePanelID="upTarefas" DisplayAfter="2000" >
<ProgressTemplate>Loading...</ProgressTemplate>
</asp:UpdateProgress>
<asp:UpdatePanel ID="upTarefas" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnFiltra" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="btnAtualizar" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="btnExtrair" EventName="Click" />
</Triggers>
<ContentTemplate>
<div id="dTabelaTarefaHeader" class="PVPortletHeader">
<div id="dTabelaTarefasOpcoes" class="PVPortletHeaderOpcoes"></div>
<b>Tarefas Faturação</b>
</div>
<asp:Panel runat="server" ID="pgvTarefasEmpty" Visible="false">
<table class="PVPortlet">
<tbody>
<tr>
<th></th>
<th>ID</th>
<th>Projeto</th>
<th>Tarefa</th>
<th>Cliente</th>
<th>Pedido</th>
<th>Inicio</th>
<th>Fim</th>
<th>Faturar?</th>
<th>Planeado</th>
<th>Remanescente</th>
<th>Faturado</th>
<th>Entidade</th>
</tr>
<tr>
<td colspan="13">Sem dados...</td>
</tr>
</tbody>
</table>
</asp:Panel>
<asp:GridView ID="gvTarefas" runat="server" AutoGenerateSelectButton="true"
AutoGenerateColumns="false" CssClass="PVPortlet" SelectedRowStyle-CssClass="PVPortletSelectedRow"
onselectedindexchanged="gvTarefas_SelectedIndexChanged" DataKeyNames="ID"
OnRowCreated="gvTarefas_OnRowCreated">
<columns>
<asp:BoundField DataField="ID" HtmlEncode="false" HeaderText="ID" />
<asp:BoundField DataField="Projeto" HtmlEncode="false" HeaderText="Projeto" />
<asp:BoundField DataField="Tarefa" HtmlEncode="false" HeaderText="Tarefa" />
<asp:BoundField DataField="Cliente" HtmlEncode="false" HeaderText="Cliente" />
<asp:BoundField DataField="Pedido" HtmlEncode="false" HeaderText="Pedido" />
<asp:BoundField DataField="DataInicio" DataFormatString="{0:dd-MM-yyyy}" HeaderText="Inicio" />
<asp:BoundField DataField="DataFim" DataFormatString="{0:dd-MM-yyyy}" HeaderText="Fim" />
<asp:TemplateField HeaderText="Faturar?">
<ItemTemplate>
<asp:CheckBox runat="server" ID="cbFaturar" Checked='<%# Eval("ProntoAFaturar") %>' AutoPostBack="true" OnCheckedChanged="cb_OnCheckedChanged"/>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Planeado" HeaderText="Planeado" />
<asp:BoundField DataField="Remanescente" HeaderText="Remanescente" />
<asp:BoundField DataField="Faturado" HeaderText="Faturado" />
<utl:CompositeBoundField HeaderText="Entidade" DataField="EntidadeResponsavel.Descricao" />
</columns>
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
<br />
<br />
<asp:UpdateProgress ID="uprgParcelas" runat="server"
AssociatedUpdatePanelID="upParcelas" DisplayAfter="2000">
<ProgressTemplate>Loading...</ProgressTemplate>
</asp:UpdateProgress>
<asp:UpdatePanel ID="upParcelas" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:asyncpostbacktrigger controlid="gvTarefas"
EventName="SelectedIndexChanged" />
<asp:asyncpostbacktrigger controlid="gvParcelas" EventName="RowEditing" />
</Triggers>
<ContentTemplate>
<div ID="dTabelaParcelasHeader" class="PVPortletHeader">
<b>Parcelas Faturação</b>
</div>
<asp:Panel ID="pgvParcelasEmpty" runat="server" Visible="false">
<table class="PVPortlet">
<tbody>
<tr>
<th></th>
<th>ID</th>
<th>Auto</th>
<th>DataEnvio</th>
<th>Descrição</th>
<th>Valor</th>
</tr>
<tr>
<td colspan="6">Sem dados...</td>
</tr>
</tbody>
</table>
</asp:Panel>
<asp:GridView ID="gvParcelas" runat="server" AutoGenerateColumns="false" AutoGenerateDeleteButton="true" AutoGenerateEditButton="true"AutoGenerateSelectButton="true" CssClass="PVPortlet" DataKeyNames="ID" OnRowCancelingEdit="gvParcelas_OnRowCancelingEdit"
OnRowCommand="gvParcelas_OnRowCommand" OnRowCreated="gvParcelas_OnRowCreated" OnRowDeleting="gvParcelas_OnRowDeleting" OnRowEditing="gvParcelas_RowEditing" OnRowUpdating="gvParcelas_OnRowUpdating" Visible="false" SelectedRowStyle-CssClass="PVPortletSelectedRow"
OnSelectedIndexChanged="obterDocumento_OnSeacrh" ShowFooter="True">
<Columns>
<asp:TemplateField HeaderText="ID">
<EditItemTemplate>
<asp:Label ID="lIDParcela" runat="server" Text='<%# Eval("ID") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lIDParcela" runat="server" Text='<%# Eval("ID") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:Button ID="btnParcelaNovo" runat="server" CommandName="Insert" Text="Novo" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Auto">
<EditItemTemplate>
<asp:CheckBox ID="cbAuto" runat="server" Checked='<%# Eval("Auto") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:CheckBox ID="cbAuto" runat="server" Checked='<%# Eval("Auto") %>' Enabled="false"/>
</ItemTemplate>
<FooterTemplate>
<asp:CheckBox ID="cbAuto" runat="server" Checked="true" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="DataEnvio">
<EditItemTemplate>
<asp:TextBox ID="txbDataEnvio" runat="server" Text='<%# Eval("DataEnvio","{0:dd-MM-yyyy}") %>' />
<asp:CalendarExtender ID="txbDataEnvio_CalendarExtender" runat="server"
DefaultView="Months" Enabled="True" Format="MM-yyyy" PopupPosition="BottomLeft"
TargetControlID="txbDataEnvio">
</asp:CalendarExtender>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lDataEnvio" runat="server"
Text='<%# Eval("DataEnvio","{0:dd-MM-yyyy}") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txbDataEnvio" runat="server" Text="" />
<asp:CalendarExtender ID="txbDataEnvio_CalendarExtender" runat="server"
DefaultView="Months" Enabled="True" Format="MM-yyyy" PopupPosition="BottomLeft"
TargetControlID="txbDataEnvio">
</asp:CalendarExtender>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Descrição">
<EditItemTemplate>
<asp:TextBox ID="txbDescricao" runat="server" Text='<%# Eval("Descricao") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lDescricao" runat="server" Text='<%# Eval("Descricao") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txbDescricao" runat="server" Text="" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Valor">
<EditItemTemplate>
<asp:TextBox ID="txbValor" runat="server" Text='<%# Eval("Valor") %>' />
<asp:FilteredTextBoxExtender ID="txbValor_FilteredTextBoxExtender" runat="server" FilterType="Custom" TargetControlID="txbValor" ValidChars="0123456789,">
</asp:FilteredTextBoxExtender>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lValor" runat="server" Text='<%# Eval("Valor") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txbValor" runat="server" Text="" />
<asp:FilteredTextBoxExtender ID="txbValor_FilteredTextBoxExtender"
runat="server" FilterType="Numbers" TargetControlID="txbValor">
</asp:FilteredTextBoxExtender>
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="uprgDocumentos" runat="server"
AssociatedUpdatePanelID="upDocumentos" DisplayAfter="2000">
<ProgressTemplate>Loading...</ProgressTemplate>
</asp:UpdateProgress>
<asp:UpdatePanel ID="upDocumentos" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<div ID="dTabelaDocumentosHeader" class="PVPortletHeader">
<div ID="dTabelaDocumentosOpcoes" class="PVPortletHeaderOpcoes">
<asp:Label ID="lDocInicio" runat="server" Text="Inicio" style="float:left;"></asp:Label>
<asp:TextBox ID="txbInicio" runat="server" style="float:left;"></asp:TextBox>
<asp:CalendarExtender ID="txbInicio_CalendarExtender" runat="server" Enabled="True" Format="MM-yyyy" TargetControlID="txbInicio">
</asp:CalendarExtender>
<asp:Label ID="lDocFim" runat="server" Text="Fim" style="float:left;"></asp:Label>
<asp:TextBox ID="txbFim" runat="server" style="float:left;"></asp:TextBox>
<asp:CalendarExtender ID="txbFim_CalendarExtender" runat="server" Enabled="True" Format="MM-yyyy" TargetControlID="txbFim">
</asp:CalendarExtender>
<asp:Button ID="btnDocFiltro" runat="server" Text="Pesquisar" style="float:left;" OnClick="obterDocumento_OnSeacrh"/>
</div>
<b>Documentos Faturação</b>
<asp:Button ID="btnNovoDocumento" runat="server" OnClientClick="abrirDocumento(0);" Text="Novo" style="float:right;"/>
</div>
<asp:Panel ID="pgvDocumentosEmpty" runat="server" Visible="false">
<table class="PVPortlet">
<tbody>
<tr>
<th></th>
<th>ID</th>
<th>Fatura</th>
<th>Enviado</th>
<th>Estado</th>
<th>Tipo</th>
<th>Descrição</th>
<th>Valor</th>
</tr>
<tr>
<td colspan="8">Sem dados...</td>
</tr>
</tbody>
</table>
</asp:Panel>
<asp:GridView ID="gvDocumentos" runat="server" AutoGenerateColumns="false" AutoGenerateDeleteButton="false" AutoGenerateEditButton="false" AutoGenerateSelectButton="false" CssClass="PVPortlet">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton Text="Abrir" runat="server" ID="lbtnAbrirDoc" OnClientClick='<%#"abrirDocumento(" + Eval("ID") + ");"%>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="ID" HeaderText="ID" HtmlEncode="false" />
<asp:BoundField DataField="NFATURA" HeaderText="Fatura" HtmlEncode="false" />
<asp:BoundField DataField="EnviadoA" DataFormatString="{0:dd-MM-yyyy}" HeaderText="Enviado" HtmlEncode="false" />
<utl:CompositeBoundField DataField="Estado.Descricao" HeaderText="Estado" HtmlEncode="false" />
<utl:CompositeBoundField DataField="Tipo.Descricao" HeaderText="Tipo" HtmlEncode="false" />
<asp:TemplateField HeaderText="Descrição">
<ItemTemplate>
<asp:Label ID="lCabecalho" runat="server" Text='<%#Eval("Cabecalho").ToString().Cut(30,true)+"-"+Eval("Periodo")%>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Valor" HeaderText="Valor" HtmlEncode="false" />
</Columns>
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
服务器SIde
protected void Page_Load(object sender, EventArgs e)
{
userName = HttpContext.Current.User.Identity.Name.ToString().ToUpper();
sessionID = Session.SessionID;
if (!IsPostBack)
{
Session["USER_" + sessionID] = userName;
Session["TAREFAS_INV_" + sessionID] = null;
Session["PARCELAS_"+sessionID] = null;
Session["DOCUMENTOS_"+sessionID] = null;
carregaDadosFiltros();
string idPrj = null;
obtemParametrosEntrada(ref idPrj);
pgvDocumentosEmpty.Visible = true;
pgvParcelasEmpty.Visible = true;
pgvTarefasEmpty.Visible = true;
gvDocumentos.Visible = false;
gvParcelas.Visible = false;
gvTarefas.Visible = false;
if (!string.IsNullOrEmpty(idPrj))
{
bool filtra = true;
if (cblProjeto.Items.FindByValue(idPrj) != null)
{
cblProjeto.SelectedValue = idPrj;
}
else
{
string nome = InvDataAccess.obterNomeProjeto(idPrj);
if(!string.IsNullOrEmpty(nome))
{
ListItem prj = new ListItem(nome, idPrj, true);
cblProjeto.Items.Add(prj);
cblProjeto.SelectedValue = prj.Value;
}
else
filtra = false;
}
cblCliente.SelectedValue = "all";
cblPedido.SelectedValue = "all";
if(filtra) btnFiltra_Click(null, null);
}
}
else
{
userName = Session["USER_" + sessionID] as string;
DateTime inicio = DateTime.MinValue, fim = DateTime.MaxValue;
if (!DateTime.TryParseExact(txbInicio.Text, txbInicio_CalendarExtender.Format, null, System.Globalization.DateTimeStyles.None, out inicio))
txbInicio_CalendarExtender.SelectedDate = DateTime.MinValue;
if (!DateTime.TryParseExact(txbFim.Text, txbFim_CalendarExtender.Format, null, System.Globalization.DateTimeStyles.None, out fim))
txbFim_CalendarExtender.SelectedDate = DateTime.MaxValue;
if (Session["TAREFAS_INV_"+sessionID] != null)
tarefas = (Dictionary<int, InvTarefas>)Session["TAREFAS_INV_"+sessionID];
if (Session["PARCELAS_"+sessionID] != null)
{
parcelas = (Dictionary<int, InvParcelaTarefa>)Session["PARCELAS_"+sessionID];
gvParcelas.DataSource = parcelas.Values.ToList();
}
if (Session["DOCUMENTOS_"+sessionID] != null)
{
documentos = (Dictionary<int, InvDocumento>)Session["DOCUMENTOS_"+sessionID];
gvDocumentos.DataSource = documentos.Values.ToList();
}
}
}
protected void btnFiltra_Click(object sender, EventArgs e)
{
tarefas.Clear();
List<string> idCliente, idPedido, idProjeto;
DateTime inicio, fim;
idCliente = cblCliente.Items.Cast<ListItem>().Where(i => i.Selected).Select(i => i.Value).ToList();
idPedido = cblPedido.Items.Cast<ListItem>().Where(i => i.Selected).Select(i => i.Value).ToList();
idProjeto = cblProjeto.Items.Cast<ListItem>().Where(i => i.Selected).Select(i => i.Value).ToList();
inicio = DateTime.MinValue;
fim = DateTime.MaxValue;
List<InvTarefas> tars = InvTarefas.getInvTarefas(new List<string>{"all"}, idCliente, idPedido, idProjeto, inicio, fim);
if (tars != null && tars.Count > 0)
{
foreach (InvTarefas tar in tars)
{
tarefas.Add(tar.ID, tar);
}
this.Session["TAREFAS_INV_"+sessionID] = tarefas;
gvTarefas.DataSource = tarefas.Values.ToList();
gvTarefas.DataBind();
pgvTarefasEmpty.Visible = false;
gvTarefas.Visible = true;
}
else
{
this.Session["TAREFAS_INV_"+sessionID] = null;
pgvTarefasEmpty.Visible = true;
gvTarefas.Visible = false;
}
}
答案 0 :(得分：4)
在一位同事的帮助下，我们发现gvTarefas_OnRowCreated事件在Page_load之前被触发，而且里面的代码是trowing null异常。
我还被建议将我的事件更改为OnRowDataBound。 另外，对于那些不知道你可以设置的人（当遇到麻烦，否则会加载很多）VS停止在抛出异常的行上调试 - ＆gt;异常 - ＆gt;抛出公共语言运行时例外。如果我知道这一点，我可能马上就解决了。
现在，关于Page_Load之前的奇怪的OnRowCreated，我仍然无法理解，但有些东西告诉我这是因为我的UpdatePanel upBody捕获了大部分页面，其更新模式是Always（是默认值）。 / p>
最后，我正在使用我的OnRowCreated代码
protected void gvTarefas_OnRowCreated(Object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
InvTarefas tar = e.Row.DataItem as InvTarefas;
if (tar.EntidadeResponsavel != InvEntidadeResponsavel.PV_PROPRIO)
{
e.Row.Enabled = false;
e.Row.CssClass = "PVPortlet_DisabledRoW";
}
}
}