为什么要将GridView数据导出到Excel，而是导出整个页面？ [英] Why is exporting GridView data to Excel, exports the entire page instead?
本文介绍了为什么要将GridView数据导出到Excel，而是导出整个页面？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的内容页面中有一个GridView以及我用于过滤的一些DropDownList：
I have a GridView in my Content page along with some DropDownList which I use for filtering:
<asp:Panel ID="pnlDropDown" runat="server" ClientIDMode="Static" CssClass="pnlDropDown">
<!-- TASK NAME -->
<asp:DropDownList ID="ddlTaskName" CssClass="chosen-select" DataSourceID="dsPopulateTaskName" AutoPostBack="true" DataValueField="Task Name" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlTaskName_onSelectIndexChanged">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="dsPopulateTaskName" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource>
<!-- SERVICE -->
<asp:DropDownList ID="ddlService" CssClass="chosen-select" DataSourceID="dsPopulateService" AutoPostBack="true" DataValueField="Service" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlService_onSelectIndexChanged">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="dsPopulateService" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource>
<!-- STATUS -->
<asp:DropDownList ID="ddlStatus" CssClass="chosen-select" DataSourceID="dsPopulateStatus" AutoPostBack="true" DataValueField="Status" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlStatus_onSelectIndexChanged">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="dsPopulateStatus" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource>
<!-- DUE DATE -->
<asp:DropDownList ID="ddlDueDate" CssClass="chosen-select" DataSourceID="dsPopulateDueDate" AutoPostBack="true" DataValueField="Due Date" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlDueDate_onSelectIndexChanged">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="dsPopulateDueDate" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource>
<!-- OWNER -->
<asp:DropDownList ID="ddlOwner" CssClass="chosen-select" DataSourceID="dsPopulateOwner" AutoPostBack="true" DataValueField="Owner" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlOwner_onSelectIndexChanged">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="dsPopulateOwner" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource>
<!-- CLIENT -->
<asp:DropDownList ID="ddlClient" CssClass="chosen-select" DataSourceID="dsPopulateClient" AutoPostBack="true" DataValueField="Client" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlClient_onSelectIndexChanged">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="dsPopulateClient" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource>
<!-- SITE -->
<asp:DropDownList ID="ddlSite" CssClass="chosen-select" DataSourceID="dsPopulateSite" AutoPostBack="true" DataValueField="Site" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlSite_onSelectIndexChanged">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="dsPopulateSite" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource>
<!-- PRACTICE -->
<asp:DropDownList ID="ddlPractice" CssClass="chosen-select" DataSourceID="dsPopulatePractice" AutoPostBack="true" DataValueField="Practice" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlPractice_onSelectIndexChanged">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="dsPopulatePractice" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource>
<!-- PROVIDER -->
<asp:DropDownList ID="ddlProvider" CssClass="chosen-select" DataSourceID="dsPopulateProvider" AutoPostBack="true" DataValueField="Provider" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlProvider_onSelectIndexChanged">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="dsPopulateProvider" runat="server" ConnectionString="<%$ ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource>
</asp:Panel>
<asp:GridView ShowHeaderWhenEmpty="false" AlternatingRowStyle-BackColor="#EBE9E9" AutoGenerateColumns="false" OnSorting="yourTasksGV_Sorting" AllowSorting="true" ID="yourTasksGV" runat="server" ClientIDMode="Static" EmptyDataText="You currently have no tasks assigned to you" OnRowDataBound="yourTasksGV_RowDataBound" OnRowCreated="yourTasksGV_RowCreated">
<Columns>
<asp:HyperLinkField Target="_self" DataNavigateUrlFields="Task Detail" DataTextField="Task Name" DataNavigateUrlFormatString="" HeaderText="Task Detail" SortExpression="Task Name" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Service" HeaderText="Service" SortExpression="Service" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Status" HeaderText="Status" SortExpression="Status" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Due Date" HeaderText="Due" SortExpression="Due Date" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Owner" HeaderText="Owner" SortExpression="Owner" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Client" HeaderText="Client" SortExpression="Client" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Site" HeaderText="Site" SortExpression="Site" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Practice" HeaderText="Practice" SortExpression="Practice" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Provider" HeaderText="Provider" SortExpression="Provider" ItemStyle-CssClass="taskTableColumn" />
</Columns>
</asp:GridView>
I populate the GridView from code-behind and also attach all the DropDownList to the GridView as the first header row:
I populate the GridView from code-behind and also attach all the DropDownList to the GridView as the first header row:
protected void yourTasksGV_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Header)
{
GridView hGrid = (GridView)sender;
GridViewRow gvrRow = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Insert);
TableHeaderCell tcCellTask = new TableHeaderCell();
tcCellTask.Controls.Add(ddlTaskName);
gvrRow.Cells.Add(tcCellTask);
TableHeaderCell tcCellSvc = new TableHeaderCell();
tcCellSvc.Controls.Add(ddlService);
gvrRow.Cells.Add(tcCellSvc);
TableHeaderCell tcCellStats = new TableHeaderCell();
tcCellStats.Controls.Add(ddlStatus);
gvrRow.Cells.Add(tcCellStats);
TableHeaderCell tcCellDD = new TableHeaderCell();
tcCellDD.Controls.Add(ddlDueDate);
gvrRow.Cells.Add(tcCellDD);
TableHeaderCell tcCellOwner = new TableHeaderCell();
tcCellOwner.Controls.Add(ddlOwner);
gvrRow.Cells.Add(tcCellOwner);
TableHeaderCell tcCellCli = new TableHeaderCell();
tcCellCli.Controls.Add(ddlClient);
gvrRow.Cells.Add(tcCellCli);
TableHeaderCell tcCellSit = new TableHeaderCell();
tcCellSit.Controls.Add(ddlSite);
gvrRow.Cells.Add(tcCellSit);
TableHeaderCell tcCellPra = new TableHeaderCell();
tcCellPra.Controls.Add(ddlPractice);
gvrRow.Cells.Add(tcCellPra);
TableHeaderCell tcCellPro = new TableHeaderCell();
tcCellPro.Controls.Add(ddlProvider);
gvrRow.Cells.Add(tcCellPro);
yourTasksGV.Controls[0].Controls.AddAt(0, gvrRow);
LinkButton btnSort;
System.Web.UI.WebControls.Image image;
//iterate through all the header cells
foreach (TableCell cell in e.Row.Cells)
{
//check if the header cell has any child controls
if (cell.HasControls())
{
//get reference to the button column
btnSort = (LinkButton)cell.Controls[0];
image = new System.Web.UI.WebControls.Image();
if (ViewState["sortExp"] != null)
{
//see if the button user clicked on and the sortexpression in the viewstate are same
//this check is needed to figure out whether to add the image to this heade column or not
if (btnSort.CommandArgument == ViewState["sortExp"].ToString())
{
//check what type of sort order it is
if (ViewState["sortOrder"].ToString() == "Asc")
{
image.ImageUrl = "../theImages/up.png";
image.CssClass = "hdrImage";
}
else
{
image.ImageUrl = "../theImages/down.png";
image.CssClass = "hdrImage";
}
cell.Controls.Add(image);
}
}
}
}
}
}
I have a button in the MasterPage which, when the user clicks, takes that GridView in the Content page and exports is:
I have a button in the MasterPage which, when the user clicks, takes that GridView in the Content page and exports is:
<asp:LinkButton ID="btnExport" runat="server" Text="Excel" ClientIDMode="Static" OnClick="btnExport_Click" CssClass="linkOff" />
protected void btnExport_Click(object sender, EventArgs e)
{
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=yourTaskList.xls");
Response.Charset = "";
Response.ContentType = "application/excel";
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView gvTasks = (GridView)ContentMain.FindControl("yourTasksGV"); //accessing the control from the content page
if (gvTasks != null && gvTasks.Rows.Count > 0)
{
gvTasks.AllowPaging = false;
//gvTasks.DataBind();
gvTasks.HeaderRow.Style.Add("background", "#CCCCCC");
//Apply style to Individual Cells
gvTasks.HeaderRow.Cells[0].Style.Add("background-color", "#E2E2E2");
gvTasks.HeaderRow.Cells[1].Style.Add("background-color", "#E2E2E2");
gvTasks.HeaderRow.Cells[2].Style.Add("background-color", "#E2E2E2");
gvTasks.HeaderRow.Cells[3].Style.Add("background-color", "#E2E2E2");
gvTasks.HeaderRow.Cells[4].Style.Add("background-color", "#E2E2E2");
gvTasks.HeaderRow.Cells[5].Style.Add("background-color", "#E2E2E2");
for (int i = 0; i <= 4; i++)
{
gvTasks.HeaderRow.Cells[i].Style.Add("height", "30px");
}
for (int i = 0; i < gvTasks.Rows.Count; i++)
{
GridViewRow row = gvTasks.Rows[i];
//Change Color back to white
row.BackColor = System.Drawing.Color.White;
//Apply text style to each Row
row.Attributes.Add("class", "textmode");
//Apply style to Individual Cells of Alternating Row
if (i % 2 != 0)
{
row.Cells[0].Style.Add("background-color", "#C2D69B");
row.Cells[1].Style.Add("background-color", "#C2D69B");
row.Cells[2].Style.Add("background-color", "#C2D69B");
row.Cells[3].Style.Add("background-color", "#C2D69B");
row.Cells[4].Style.Add("background-color", "#C2D69B");
}
}
gvTasks.RenderControl(hw);
//style to format numbers to string
string style = @"<style> .textmode { mso-number-format:\@; } </style>";
Response.Write(style);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
}
}
When I click the button it fails to export, when I retry it, it opens and instead of just saving the GridView, it opens the webpage instead inside Excel.
How do I modify/add to my code to make it work correctly?
The page itself gets exported not the GridView!
UPDATE: The error happens when I want to OPEN it without saving. When I save and then open, it works fine.
When I click the button it fails to export, when I retry it, it opens and instead of just saving the GridView, it opens the webpage instead inside Excel.
How do I modify/add to my code to make it work correctly?
The page itself gets exported not the GridView!
UPDATE: The error happens when I want to OPEN it without saving. When I save and then open, it works fine.
推荐答案
ConnectionStrings:gvConnString %>\" SelectCommand=\"\"></asp:SqlDataSource>
\t<!-- SERVICE -->
\t<asp:DropDownList ID=\"ddlService\" CssClass=\"chosen-select\" DataSourceID=\"dsPopulateService\" AutoPostBack=\"true\" DataValueField=\"Service\" runat=\"server\" Width=\"100%\" Font-Size=\"11px\" AppendDataBoundItems=\"true\" OnSelectedIndexChanged=\"ddlService_onSelectIndexChanged\">
\t\t<asp:ListItem Text=\"All\" Value=\"%\"></asp:ListItem>
\t</asp:DropDownList>
\t<asp:SqlDataSource ID=\"dsPopulateService\" runat=\"server\" ConnectionString=\"<%
ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource> <!-- SERVICE --> <asp:DropDownList ID="ddlService" CssClass="chosen-select" DataSourceID="dsPopulateService" AutoPostBack="true" DataValueField="Service" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlService_onSelectIndexChanged"> <asp:ListItem Text="All" Value="%"></asp:ListItem> </asp:DropDownList> <asp:SqlDataSource ID="dsPopulateService" runat="server" ConnectionString="<%
ConnectionStrings:gvConnString %>\" SelectCommand=\"\"></asp:SqlDataSource>
\t<!-- STATUS -->
\t<asp:DropDownList ID=\"ddlStatus\" CssClass=\"chosen-select\" DataSourceID=\"dsPopulateStatus\" AutoPostBack=\"true\" DataValueField=\"Status\" runat=\"server\" Width=\"100%\" Font-Size=\"11px\" AppendDataBoundItems=\"true\" OnSelectedIndexChanged=\"ddlStatus_onSelectIndexChanged\">
\t\t<asp:ListItem Text=\"All\" Value=\"%\"></asp:ListItem>
\t</asp:DropDownList>
\t<asp:SqlDataSourceID=\"dsPopulateStatus\" runat=\"server\" ConnectionString=\"<%
ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource> <!-- STATUS --> <asp:DropDownList ID="ddlStatus" CssClass="chosen-select" DataSourceID="dsPopulateStatus" AutoPostBack="true" DataValueField="Status" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlStatus_onSelectIndexChanged"> <asp:ListItem Text="All" Value="%"></asp:ListItem> </asp:DropDownList> <asp:SqlDataSource ID="dsPopulateStatus" runat="server" ConnectionString="<%
ConnectionStrings:gvConnString %>\" SelectCommand=\"\"></asp:SqlDataSource>
\t<!-- DUE D ATE -->
\t<asp:DropDownList ID=\"ddlDueDate\" CssClass=\"chosen-select\" DataSourceID=\"dsPopulateDueDate\" AutoPostBack=\"true\" DataValueField=\"Due Date\" runat=\"server\" Width=\"100%\" Font-Size=\"11px\" AppendDataBoundItems=\"true\" OnSelectedIndexChanged=\"ddlDueDate_onSelectIndexChanged\">
\t\t<asp:ListItem Text=\"All\" Value=\"%\"></asp:ListItem>
\t</asp:DropDownList>
\t<asp:SqlDataSource ID=\"dsPopulateDueDate\" runat=\"server\" ConnectionString=\"<%
ConnectionStrings:gvConnString %>" SelectCommand=""></asp:SqlDataSource> <!-- DUE DATE --> <asp:DropDownList ID="ddlDueDate" CssClass="chosen-select" DataSourceID="dsPopulateDueDate" AutoPostBack="true" DataValueField="Due Date" runat="server" Width="100%" Font-Size="11px" AppendDataBoundItems="true" OnSelectedIndexChanged="ddlDueDate_onSelectIndexChanged"> <asp:ListItem Text="All" Value="%"></asp:ListItem> </asp:DropDownList> <asp:SqlDataSource ID="dsPopulateDueDate" runat="server" ConnectionString="<%
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