[英]Exporting GridView to Excel
我有一个带有按钮的gridview,用于将其数据导出到Excel文件。 单击该按钮时,出现以下错误:
类型为“ GridView”的控件“ gvLogNotice”必须放置在带有runat = server的表单标记中。
但是,网格位于一个表单标记中,我既使用MasterPage尝试使用带w / oa MasterPage的页面,也仍然遇到相同的错误。
这是我的带有按钮的Gridview代码段:
<form id="form1" runat="server">
<div style="width:600px;">
<asp:GridView ID="gvLogNotice"
runat="server"
AutoGenerateColumns="false"
ShowFooter="false"
OnRowCancelingEdit="gvLogNotice_RowCancelingEdit"
OnRowEditing="gvLogNotice_RowEditing"
OnRowUpdating="gvLogNotice_RowUpdating"
onpageindexchanging="gvLogNotice_PageIndexChanging"
OnRowDataBound="gvLogNotice_RowDataBound"
EmptyDataText="There are no data records to display."
DataKeyNames="LogNoticeID"
AllowPaging="true"
PageSize="10"
AllowSorting="true"
OnSorting="gvLogNotice_sorting"
Width="700px">
<Columns>
<asp:TemplateField HeaderText="Log No." Visible="false">
<ItemTemplate>
<%#Eval("LogNoticeID")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtLogNoticeID" runat="server" Enabled="false" Text=' <%#Eval("LogNoticeID") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Log Date" SortExpression="DateLogged">
<ItemTemplate>
<%#Eval("DateLogged")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtDateLogged" runat="server" Text=' <%#Eval("DateLogged") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Log Description" HeaderStyle-Width="50px" sortexpression="LogNoticeDescript">
<ItemTemplate>
<%#Eval("LogNoticeDescript")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtLogNoticeDescript" runat="server" Text=' <%#Eval("LogNoticeDescript") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Responsible Party" sortexpression="ResponsibleParty">
<ItemTemplate>
<%#Eval("ResponsibleParty")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtResponsibleParty" runat="server" Text=' <%#Eval("ResponsibleParty") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Planned Date" SortExpression="PlannedDate" >
<ItemTemplate>
<%#Eval("PlannedDate")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtPlannedDate" runat="server" Text=' <%#Eval("PlannedDate") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Case Number" SortExpression="CaseNumber">
<ItemTemplate>
<%#Eval("CaseNumber")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtCaseNumber" runat="server" Text=' <%#Eval("CaseNumber") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Log Status" SortExpression="LogStatus">
<ItemTemplate>
<%#Eval("LogStatus")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtLogStatus" runat="server" Text=' <%#Eval("LogStatus") %>'></asp:TextBox>
<asp:RangeValidator ID="rgvtxtLogStatus" runat="server" ControlToValidate="txtLogStatus" MaximumValue="1" MinimumValue="0" Text="Only a Value of 1 or 0 is allowed." />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edit">
<ItemTemplate>
<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="images/edit.png" Width="25"
Height="25" CommandName="Edit" />
<%-- <asp:ImageButton ID="ImageButton2" runat="server" ImageUrl="~/img/delete.png" CommandName="Delete"
OnClientClick="return confirm('Are you sure want to delete record?')" />--%>
</ItemTemplate>
<EditItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CommandName="Update">Update</asp:LinkButton>
<asp:LinkButton ID="LinkButton2" runat="server" CommandName="Cancel">Cancel</asp:LinkButton>
</EditItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
<div><asp:Button runat="server" ID="btnExport" Text="Export to Excel"
onclick="btnExport_Click" /></div>
</form>
...这是按钮后面的代码:
protected void btnExport_Click(object sender, EventArgs e)
{
Response.Clear();
Response.AddHeader("content-disposition", "attachment; filename=FileName.xls");
Response.ContentType = "application/vnd.xls";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite =
new HtmlTextWriter(stringWrite);
gvLogNotice.RenderControl(htmlWrite);
Response.Write(stringWrite.ToString());
Response.End();
}
...第二种方法:我还尝试了以下方法,但出现一个错误,即只能存在一个表格:
protected void btnExport_Click(object sender, EventArgs e)
{
try
{
Response.ClearContent();
string attachment = "attachment; filename=MyExelFile.xls";
Response.ClearContent();
Response.AddHeader("content-disposition", attachment);
Response.ContentType = "application/ms-excel";
StringWriter strWrite = new StringWriter();
HtmlTextWriter htmWrite = new HtmlTextWriter(strWrite);
HtmlForm htmfrm = new HtmlForm();
gvLogNotice.Parent.Controls.Add(htmfrm);
htmfrm.Attributes["runat"] = "server";
htmfrm.Controls.Add(gvLogNotice);
htmfrm.RenderControl(htmWrite);
Response.Write(strWrite.ToString());
Response.Flush();
Response.End();
}
catch (Exception ex) { }
}
关于我在这里遗失的东西,我能请一些帮助吗? 先感谢您。
在导出按钮上尝试以下代码:
protected void btnExport_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.xls");
Response.Charset = "";
Response.ContentType = "application/vnd.ms-excel";
using (StringWriter sw = new StringWriter())
{
HtmlTextWriter hw = new HtmlTextWriter(sw);
//To Export all pages
GridView1.AllowPaging = false;
GridViewBind();
GridView1.HeaderRow.BackColor = Color.White;
foreach (TableCell cell in GridView1.HeaderRow.Cells)
{
cell.BackColor = GridView1.HeaderStyle.BackColor;
}
foreach (GridViewRow row in GridView1.Rows)
{
row.BackColor = Color.White;
foreach (TableCell cell in row.Cells)
{
if (row.RowIndex % 2 == 0)
{
cell.BackColor = GridView1.AlternatingRowStyle.BackColor;
}
else
{
cell.BackColor = GridView1.RowStyle.BackColor;
}
cell.CssClass = "textmode";
}
}
GridView1.RenderControl(hw);
//style to format numbers to string
string style = @"<style> .textmode { } </style>";
Response.Write(style);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
}
}
public override void VerifyRenderingInServerForm(Control control)
{
/* Verifies that the control is rendered */
}
尝试这个
protected void Button2_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition",
"attachment;filename=GridViewExport.xls");
Response.Charset = "";
Response.ContentType = "application/vnd.xls";
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView1.AllowPaging = false;
GridView1.DataBind();
GridView1.RenderControl(hw);
string style = @"<style> .textmode { mso-number-format:\@; } </style>";
Response.Write(style);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
}
private void ExportToExcel(DataTable dt)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=Sheet1.xls");
Response.Charset = "";
Response.ContentType = "application/vnd.ms-excel";
GridView dgGrid = new GridView();
using (StringWriter sw = new StringWriter())
{
HtmlTextWriter hw = new HtmlTextWriter(sw);
dgGrid.DataSource = dt;
dgGrid.DataBind();
dgGrid.HeaderRow.BackColor = Color.White;
foreach (TableCell cell in dgGrid.HeaderRow.Cells)
{
cell.BackColor = dgGrid.HeaderStyle.BackColor;
}
foreach (GridViewRow row in dgGrid.Rows)
{
row.BackColor = Color.White;
foreach (TableCell cell in row.Cells)
{
if (row.RowIndex % 2 == 0)
{
cell.BackColor = dgGrid.AlternatingRowStyle.BackColor;
}
else
{
cell.BackColor = dgGrid.RowStyle.BackColor;
}
cell.CssClass = "textmode";
}
}
dgGrid.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();
}
}
当您的代码中没有VerifyRenderingInServerForm时,就会发生这种情况。
只需将这段代码放在您的导出代码之后,它就会消失。
public override void VerifyRenderingInServerForm(Control control)
{
/* Verifies that the control is rendered */
}
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