我想在DataGrid（Asp.net和Sqlserver2008）中显示，插入，更新，删除，然后我想将数据从datagrid导出到excel文件。 Table Structure
Default.aspx的
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="_Default" EnableEventValidation="false"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>'A'</title>
<style type="text`/css">`
.Gridview
{
font-family: Verdana;
font-size: 10pt;
font-weight: normal;
color: black;
}
</style>
<script type="text/javascript">
function ConfirmationBox(username) {
var result = confirm('Are you sure you want to delete ' + username + ' Details?');
if (result) {
return true;
}
else {
return false;
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="gvDetails" DataKeyNames="UserId,UserName" runat="server" AutoGenerateColumns="false"
CssClass="Gridview" HeaderStyle-BackColor="#61A6F8" ShowFooter="true" HeaderStyle-Font-Bold="true"
HeaderStyle-ForeColor="White" OnRowCancelingEdit="gvDetails_RowCancelingEdit"
OnRowDeleting="gvDetails_RowDeleting" OnRowEditing="gvDetails_RowEditing"
OnRowUpdating="gvDetails_RowUpdating"
OnRowCommand="gvDetails_RowCommand" Height="275px" Width="530px">
<Columns>
<asp:TemplateField>
<EditItemTemplate>
<asp:ImageButton ID="imgbtnUpdate" CommandName="Update" runat="server"
ImageUrl="~/Images/update.jpg" ToolTip="Update" Height="20px" Width="20px" />
<asp:ImageButton ID="imgbtnCancel" runat="server" CommandName="Cancel"
ImageUrl="~/Images/Cancel.jpg" ToolTip="Cancel" Height="20px" Width="20px" />
</EditItemTemplate>
<ItemTemplate>
<asp:ImageButton ID="imgbtnEdit" CommandName="Edit" runat="server"
ImageUrl="~/Images/Edit.jpg" ToolTip="Edit" Height="20px" Width="20px" />
<asp:ImageButton ID="imgbtnDelete" CommandName="Delete" runat="server"
ImageUrl="~/Images/delete.jpg" ToolTip="Delete" Height="20px" Width="20px" />
</ItemTemplate>
<FooterTemplate>
<asp:ImageButton ID="imgbtnAdd" runat="server" ImageUrl="~/Images/AddNewitem.jpg"
CommandName="AddNew" Width="30px" Height="30px" ToolTip="Add new User" ValidationGroup="validaiton" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="UserName">
<EditItemTemplate>
<asp:Label ID="lbleditusr" runat="server" Text='<%#Eval("Username") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblitemUsr" runat="server" Text='<%#Eval("UserName") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtftrusrname" runat="server" />
<asp:RequiredFieldValidator ID="rfvusername" runat="server" ControlToValidate="txtftrusrname"
Text="*" ValidationGroup="validaiton" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="City">
<EditItemTemplate>
<asp:TextBox ID="txtcity" runat="server" Text='<%#Eval("City") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblcity" runat="server" Text='<%#Eval("City") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtftrcity" runat="server" />
<asp:RequiredFieldValidator ID="rfvcity" runat="server" ControlToValidate="txtftrcity"
Text="*" ValidationGroup="validaiton" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Designation">
<EditItemTemplate>
<asp:TextBox ID="txtstate" runat="server" Text='<%#Eval("Designation") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblstate" runat="server" Text='<%#Eval("Designation") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtftrDesignation" runat="server" />
<asp:RequiredFieldValidator ID="rfvdesignation" runat="server" ControlToValidate="txtftrDesignation"
Text="*" ValidationGroup="validaiton" />
</FooterTemplate>
</asp:TemplateField>
</Columns>
<HeaderStyle BackColor="#61A6F8" Font-Bold="True" ForeColor="White"></HeaderStyle>
</asp:GridView>
</div>
<div>
<asp:Label ID="lblresult" runat="server"></asp:Label>
</div>
<div>
<asp:Button ID="btn_Excel" runat="server" Text="Excel"
onclick="btn_Excel_Click" />
</div>
</form>
</body>
</html>
Default.aspx.cs
using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Reflection;
using System.IO;
using System.Collections;
public partial class _Default : System.Web.UI.Page
{
private SqlConnection con = new SqlConnection("Data Source=.;uid=sa;pwd=sa123;database=Example1");
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindEmployeeDetails();
}
}
protected void BindEmployeeDetails()
{
con.Open();
SqlCommand cmd = new SqlCommand("Select * from Employee_Details", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
con.Close();
if (ds.Tables[0].Rows.Count > 0)
{
gvDetails.DataSource = ds;
gvDetails.DataBind();
}
else
{
ds.Tables[0].Rows.Add(ds.Tables[0].NewRow());
gvDetails.DataSource = ds;
gvDetails.DataBind();
int columncount = gvDetails.Rows[0].Cells.Count;
gvDetails.Rows[0].Cells.Clear();
gvDetails.Rows[0].Cells.Add(new TableCell());
gvDetails.Rows[0].Cells[0].ColumnSpan = columncount;
gvDetails.Rows[0].Cells[0].Text = "No Records Found";
}
}
protected void gvDetails_RowEditing(object sender, GridViewEditEventArgs e)
{
gvDetails.EditIndex = e.NewEditIndex;
BindEmployeeDetails();
}
protected void gvDetails_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
int userid = Convert.ToInt32(gvDetails.DataKeys[e.RowIndex].Value.ToString());
string username = gvDetails.DataKeys[e.RowIndex].Values["UserName"].ToString();
TextBox txtcity = (TextBox)gvDetails.Rows[e.RowIndex].FindControl("txtcity");
TextBox txtDesignation = (TextBox)gvDetails.Rows[e.RowIndex].FindControl("txtstate");
con.Open();
SqlCommand cmd = new SqlCommand("update Employee_Details set City='" + txtcity.Text + "',Designation='" + txtDesignation.Text + "' where UserId=" + userid, con);
cmd.ExecuteNonQuery();
con.Close();
lblresult.ForeColor = Color.Green;
lblresult.Text = username + " Details Updated successfully";
gvDetails.EditIndex = -1;
BindEmployeeDetails();
}
protected void gvDetails_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
gvDetails.EditIndex = -1;
BindEmployeeDetails();
}
protected void gvDetails_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
int userid = Convert.ToInt32(gvDetails.DataKeys[e.RowIndex].Values["UserId"].ToString());
string username = gvDetails.DataKeys[e.RowIndex].Values["UserName"].ToString();
con.Open();
SqlCommand cmd = new SqlCommand("delete from Employee_Details where UserId=" + userid, con);
int result = cmd.ExecuteNonQuery();
con.Close();
if (result == 1)
{
BindEmployeeDetails();
lblresult.ForeColor = Color.Blue;
lblresult.Text = username + " details deleted successfully";
}
}
protected void gvDetails_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
//getting username from particular row
string username = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "UserName"));
//identifying the control in gridview
ImageButton lnkbtnresult = (ImageButton)e.Row.FindControl("imgbtnDelete");
//raising javascript confirmationbox whenver user clicks on link button
if (lnkbtnresult != null)
{
lnkbtnresult.Attributes.Add("onclick", "javascript:return ConfirmationBox('" + username + "')");
}
}
}
protected void gvDetails_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName.Equals("AddNew"))
{
TextBox txtUsrname = (TextBox)gvDetails.FooterRow.FindControl("txtftrusrname");
TextBox txtCity = (TextBox)gvDetails.FooterRow.FindControl("txtftrcity");
TextBox txtDesgnation = (TextBox)gvDetails.FooterRow.FindControl("txtftrDesignation");
con.Open();
SqlCommand cmd =
new SqlCommand("insert into Employee_Details(UserName,City,Designation) values('"
+ txtUsrname.Text + "','" + txtCity.Text + "','" + txtDesgnation.Text + "')", con);
int result = cmd.ExecuteNonQuery();
con.Close();
if (result == 1)
{
BindEmployeeDetails();
lblresult.ForeColor = Color.Blue;
lblresult.Text = txtUsrname.Text + " Details inserted successfully";
}
else
{
lblresult.ForeColor = Color.Red;
lblresult.Text = txtUsrname.Text + " Details not inserted";
}
}
}
protected void btn_Excel_Click(object sender, EventArgs e)
{
this.gvDetails.AllowPaging = false;
this.gvDetails.AllowSorting = false;
this.gvDetails.EditIndex = -1;
this.BindEmployeeDetails();
Response.Clear();
Response.ContentType = "application/vnd.xls";
Response.AddHeader("content-disposition", "attachment;filename=MyList.xls");
Response.Charset = "";
StringWriter swriter = new StringWriter();
HtmlTextWriter hwriter = new HtmlTextWriter(swriter);
gvDetails.RenderControl(hwriter);
Response.Write(swriter.ToString());
Response.End();
}
public override void VerifyRenderingInServerForm(Control control)
{
//to Render Control
}
}
我的代码运行正常。 但我的excel文件看起来像这样 Excel output
所以我不希望导出datagrid中的图像。 我怎样才能做到这一点。 请回复。
答案 0 :(得分：1)
好的，我得到了解决方案（来自同事）。 如果正确，请投票给我答案。 说明： 我们必须先制作一张临时桌子。 2.现在只从datagrid添加所需的列。 3.使用临时表在Excel中导出数据。
代码：在Button中单击调用ExportUsersDataTable函数
protected void btn_Excel_Click(object sender, EventArgs e){ExportUsersDataTable()}
功能定义是：
public void ExportUsersDataTable()
{
con.Open();
SqlCommand cmd = new SqlCommand("Select * from Employee_Details", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
con.Close();
string sFilename = "UserToRoleMapping.xls";
HttpResponse response = HttpContext.Current.Response;
response.Clear();
response.Charset = ""; //string.Empty;
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", "attachment;filename=\"" + sFilename + "\"");
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
GridView gvTemp = new GridView();
//Temporary Table for changing the ExcelSheet Headers
DataTable dtTemp = new DataTable();
dtTemp.Columns.Add("User Id");
dtTemp.Columns.Add("User Name");
dtTemp.Columns.Add("City");
dtTemp.Columns.Add("Designation");
dtTemp.AcceptChanges();
if (ds.Tables[0].Rows.Count > 0)
{
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
DataRow dr = dtTemp.NewRow();
dr["User Id"] = ds.Tables[0].Rows[i]["UserId"].ToString();
dr["User Name"] = ds.Tables[0].Rows[i]["UserName"].ToString();
dr["City"] = ds.Tables[0].Rows[i]["City"].ToString();
dr["Designation"] = ds.Tables[0].Rows[i]["Designation"].ToString();
dtTemp.Rows.Add(dr);
dtTemp.AcceptChanges();
}
}
if (dtTemp.Rows.Count > 0)
{
gvTemp.DataSource = dtTemp;
gvTemp.DataBind();
gvTemp.RenderControl(htw);
response.Write(sw.ToString());
}
response.End();
}
}
}