我的页面中有以下内容。
我需要根据各自的按钮查看gridview。即每个按钮将显示不同的数据。 gridview应该允许分页，因为有很多记录。单击图像按钮（包括gridview中的所有页面）时，也应该导出到Excel。任何人都可以帮忙吗？
我的代码正在关注
aspx文件。
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<div>
<table id="Table2" width="100%" align="left" runat="server">
<tr>
<td class="auto-style8">
</td>
<td class="auto-style9"></td><td class="auto-style10">
<asp:Button ID="Admin" runat="server" Text="Admin" TOOLTIP="Sign In" TABINDEX="3" BackColor="Gray" BorderColor="Black" BorderStyle="Groove" Font-Bold="True" Font-Names="Arial" Font-Size="Large" ForeColor="White" Height="46px" Width="85px"/>
<asp:Menu ID="Menu1" runat="server" StaticSubMenuIndent="" Font-Bold="True" Font-Size="Large">
<Items>
<asp:MenuItem Text="Home" Value="Home" NavigateUrl="Admin_Main.aspx"></asp:MenuItem>
<asp:MenuItem Text="Add Customer" Value="Add Customer" NavigateUrl="Add_Details.aspx"></asp:MenuItem>
<asp:MenuItem Text="Delete Customer" Value="Delete Customer" NavigateUrl="Delete_Customer.aspx"></asp:MenuItem>
</Items>
</asp:Menu>
<asp:LinkButton ID="logout" runat="server" OnClick="logout_click" Font-Bold="True" Font-Size="Large">Logout</asp:LinkButton>
</td>
</tr>
</table>
</div>
<div>
<asp:Label ID="Label1" runat="server" Text="UserName" Font-Bold="True"
Font-Size="X-Large"></asp:Label>
<asp:TextBox ID="userName" Name= "userName" runat="server" Font-Bold="True"></asp:TextBox>
</div>
<div>
<asp:Button ID="Button2" runat="server" Text="Email Log" OnClick= "Email_Click" Height="35px" Font-Bold="True" Font-Size="Medium" Width="90px"/>
<asp:Button ID="Button1" runat="server" Text="All Log" Height="35px" OnClick= "Log_Click" Font-Bold="True" Font-Size="Medium" Width="90px"/>
<asp:ImageButton ID="btnexport" runat="server" Height="35px" ImageUrl="~/Images/exp-xls.gif" Width="112px" OnClick="btnExport_Click" Visible="false" />
</div>
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
</asp:Content>
aspx.cs文件
public partial class Display_Log : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string user = (string)(Session["user"]);
if (!IsPostBack)
{
if (user == null)
{
Response.Redirect("~/InvalidLogin.aspx");
}
else
{
Admin.Text = user;
Admin.Enabled = false;
}
}
}
protected void Email_Click(object sender, EventArgs e)
{
SqlConnection cnn = new SqlConnection();
string connStr = ConfigurationManager.ConnectionStrings["cnn"].ConnectionString;
cnn.ConnectionString = connStr;
cnn.Open();
String sqlSelect = String.Format(" Select Customer_Name,Time_Send_Clicked,Reminder_Type from Email_Log where Username='{0}'",userName.Text.ToString().Trim());
SqlCommand myCommand = new SqlCommand(sqlSelect, cnn);
SqlDataAdapter da = new SqlDataAdapter(myCommand);
DataTable dt = new DataTable();
da.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
cnn.Close();
btnexport.Visible = true;
}
protected void btnExport_Click(object sender, EventArgs e)
{
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", string.Format("attachment; filename=ActivityReport_" + userName.Text + ".xls"));
Response.ContentType = "application/ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
GridView1.AllowPaging = false;
GridView1.RenderControl(htw);
Response.Write(sw.ToString());
Response.End();
}
public override void VerifyRenderingInServerForm(Control control)
{
/* Verifies that the control is rendered */
}
protected void Log_Click(object sender, EventArgs e)
{
SqlConnection cnn = new SqlConnection();
string connStr = ConfigurationManager.ConnectionStrings["cnn"].ConnectionString;
cnn.ConnectionString = connStr;
cnn.Open();
String sqlSelect = String.Format(" SELECT [Activity],[Time],[Ticket_Number] FROM Log where Username='{0}'", userName.Text.ToString().Trim());
SqlCommand myCommand = new SqlCommand(sqlSelect, cnn);
SqlDataAdapter da = new SqlDataAdapter(myCommand);
DataTable dt = new DataTable();
da.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
cnn.Close();
btnexport.Visible = true;
}
protected void logout_click(object sender, EventArgs e)
{
this.Session["user"] = null;
this.Session["group"] = null;
Response.Redirect("~/Default.aspx");
}
}
答案 0 :(得分：0)
要添加pagging你需要指定AllowPaging="True"这将添加pagging但它不会工作，直到你指定这个处理onclick事件时单击页面按钮
onpageindexchanging="GridView1_PageIndexChanging"
<asp:GridView ID="GridView1"AutoGenerateColumns="false" DataKeyNames="Identityrowoftable" AllowPaging="True"
onpageindexchanging="GridView1_PageIndexChanging" />
在后面的代码中添加此
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
// you need to rebind gridview here
//just set the source and databind
}
之后的打印部分
首先，您需要清除控件，以便在打印时不会出现不需要的元素。
private void ClearControls(Control control)
{
for (int i = control.Controls.Count - 1; i >= 0; i--)
{
ClearControls(control.Controls[i]);
}
if (!(control is TableCell))
{
if (control.GetType().GetProperty("SelectedItem") != null)
{
LiteralControl literal = new LiteralControl();
control.Parent.Controls.Add(literal);
try
{
literal.Text =
(string)control.GetType().GetProperty("SelectedItem").
GetValue(control, null);
}
catch
{ }
control.Parent.Controls.Remove(control);
}
else if (control.GetType().GetProperty("Text") != null)
{
LiteralControl literal = new LiteralControl();
control.Parent.Controls.Add(literal);
literal.Text =
(string)control.GetType().GetProperty("Text").
GetValue(control, null);
control.Parent.Controls.Remove(control);
}
}
return;
}
导出为excel时如何使用ClearControl
protected void btnExport_Click(object sender, EventArgs e)
{
// Reference your own GridView here
if (GridView1.Rows.Count > 65535)
{
//DisplayError("Export to Excel is not allowed" +
// "due to excessive number of rows.");
return;
}
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment;filename=nameofexcelfile_" + DateTime.Now+".xls" );
Response.Charset = "";
// SetCacheability doesn't seem to make a difference (see update)
Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache);
Response.ContentType = "application/vnd.ms-excel";
System.IO.StringWriter stringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWriter = new HtmlTextWriter(stringWriter);
// Replace all gridview controls with literals
GridView1.PagerSettings.Visible = false;
ClearControls(GridView1);
System.Web.UI.HtmlControls.HtmlForm form
= new System.Web.UI.HtmlControls.HtmlForm();
Controls.Add(form);
form.Controls.Add(GridView1GridView1);
form.RenderControl(htmlWriter);
Response.Write(stringWriter.ToString());
Response.End();
}
这将打印没有分页按钮的记录