C# 将数据转换为CSV
我有一个C#/ASPX表单,它在SQL Server中有一个包含8列(StoreID、Date、EmpID、EmployeeName、Starttime、Endtime、Starttime、Endtime)的表 我只想转换存储ID、日期、EmpID、第一个开始时间和最后一个结束时间) 但是,当我单击按钮时,它会转换所有列,在转换期间如何限制列 这是导出按钮代码:C# 将数据转换为CSV,c#,asp.net,C#,Asp.net,我有一个C#/ASPX表单,它在SQL Server中有一个包含8列(StoreID、Date、EmpID、EmployeeName、Starttime、Endtime、Starttime、Endtime)的表 我只想转换存储ID、日期、EmpID、第一个开始时间和最后一个结束时间) 但是,当我单击按钮时,它会转换所有列,在转换期间如何限制列 这是导出按钮代码: public partial class _Default : System.Web.UI.Page { protected
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnExportCSV_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.csv");
Response.Charset = "";
Response.ContentType = "application/text";
GridView1.AllowPaging = false;
GridView1.DataBind();
StringBuilder sb = new StringBuilder();
for (int k = 0; k < GridView1.Columns.Count; k++)
{
//add separator
sb.Append(GridView1.Columns[k].HeaderText + ',');
}
//append new line
sb.Append("\r\n");
for (int i = 0; i < GridView1.Rows.Count; i++)
{
for (int k = 0; k < GridView1.Columns.Count; k++)
{
//add separator
sb.Append(GridView1.Rows[i].Cells[k].Text + ',');
}
//append new line
sb.Append("\r\n");
}
Response.Output.Write(sb.ToString());
Response.Flush();
Response.End();
}
}
public分部类\u默认值:System.Web.UI.Page
{
受保护的无效页面加载(对象发送方、事件参数e)
{
}
受保护的无效btnExportCSV\u单击(对象发送方,事件参数e)
{
Response.Clear();
Response.Buffer=true;
AddHeader(“内容处置”、“附件;文件名=GridViewExport.csv”);
响应。Charset=“”;
Response.ContentType=“应用程序/文本”;
GridView1.AllowPaging=false;
GridView1.DataBind();
StringBuilder sb=新的StringBuilder();
for(int k=0;k
我还没有编译这段代码,但它应该可以工作
protected void btnExportCSV_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.csv");
Response.Charset = "";
Response.ContentType = "application/text";
GridView1.AllowPaging = false;
GridView1.DataBind();
StringBuilder sb = new StringBuilder();
bool hitFirstStartTime = false;
for (int k = 0; k < GridView1.Columns.Count; k++)
{
var letsDoThis = false;
if (GridView1.Columns[k].HeaderText == "Storeid" ||
GridView1.Columns[k].HeaderText == "Date" ||
GridView1.Columns[k].HeaderText == "EmpID")
{
letsDoThis = true;
}
else if (GridView1.Columns[k].HeaderText == "Starttime" && !hitFirstStartTime)
{
letsDoThis = true;
hitFirstStartTime = true;
}
else if (GridView1.Columns[k].HeaderText == "Endtime" && k == GridView1.Columns.Count)
{
letsDoThis = true;
}
if (letsDoThis)
sb.Append(GridView1.Columns[k].HeaderText + ',');
}
//append new line
sb.Append("\r\n");
for (int i = 0; i < GridView1.Rows.Count; i++)
{
bool hitFirstStartTime = false;
for (int k = 0; k < GridView1.Columns.Count; k++)
{
var letsDoThis = false;
if (GridView1.Columns[k].HeaderText == "Storeid" ||
GridView1.Columns[k].HeaderText == "Date" ||
GridView1.Columns[k].HeaderText == "EmpID")
letsDoThis = true;
else if (GridView1.Columns[k].HeaderText == "Starttime" &&
!hitFirstStartTime)
letsDoThis = true;
else if (GridView1.Columns[k].HeaderText == "Endtime" &&
k == GridView1.Columns.Count)
letsDoThis = true;
{
letsDoThis = true;
hitFirstStartTime = true;
}
if (letsDoThis)
sb.Append(GridView1.Columns[k].HeaderText + ',');
}
//append new line
sb.Append("\r\n");
}
Response.Output.Write(sb.ToString());
Response.Flush();
Response.End();
}
protectedvoid btnExportCSV\u单击(对象发送方,事件参数e)
{
Response.Clear();
Response.Buffer=true;
AddHeader(“内容处置”、“附件;文件名=GridViewExport.csv”);
响应。Charset=“”;
Response.ContentType=“应用程序/文本”;
GridView1.AllowPaging=false;
GridView1.DataBind();
StringBuilder sb=新的StringBuilder();
bool hitFirstStartTime=false;
for(int k=0;k
如果您知道要导出的列索引,例如:
存储ID日期EmpID|员工姓名|开始时间|结束时间|开始时间|结束时间
必须从索引为0、1、2、4、7的列中获取值
那么您的代码就可以像这样简单了
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnExportCSV_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.csv");
Response.Charset = "";
Response.ContentType = "application/text";
GridView1.AllowPaging = false;
GridView1.DataBind();
StringBuilder sb = new StringBuilder();
//add separator for header
sb.Append(GridView1.Columns[0].HeaderText).Append(",")
.Append(GridView1.Columns[1].HeaderText).Append(",")
.Append(GridView1.Columns[2].HeaderText).Append(",")
.Append(GridView1.Columns[4].HeaderText).Append(",")
.Append(GridView1.Columns[7].HeaderText).Append("\r\n");
for (int i = 0; i < GridView1.Rows.Count; i++)
{
DateTime date = DateTime.Parse(GridView1.Rows[i].Cells[1].Text);
if (date.DayOfWeek != DayOfWeek.Saturday
&& date.DayOfWeek != DayOfWeek.Sunday)
{
//add separator for each row
sb.Append(GridView1.Rows[i].Cells[0].Text).Append(",")
.Append(GridView1.Rows[i].Cells[1].Text).Append(",")
.Append(GridView1.Rows[i].Cells[2].Text).Append(",")
.Append(GridView1.Rows[i].Cells[4].Text).Append(",")
.Append(GridView1.Rows[i].Cells[7].Text).Append("\r\n");
}
}
Response.Output.Write(sb.ToString());
Response.Flush();
Response.End();
}
}
public分部类\u默认值:System.Web.UI.Page
{
受保护的无效页面加载(对象发送方、事件参数e)
{
}
受保护的无效btnExportCSV\u单击(对象发送方,事件参数e)
{
Response.Clear();
Response.Buffer=true;
AddHeader(“内容处置”、“附件;文件名=GridViewExport.csv”);
响应。Charset=“”;
Response.ContentType=“应用程序/文本”;
GridView1.AllowPaging=false;
GridView1.DataBind();
StringBuilder sb=新的StringBuilder();
//为标题添加分隔符
sb.Append(GridView1.Columns[0].HeaderText.Append(“,”)
.Append(GridView1.Columns[1].HeaderText.Append(“,”)
.Append(GridView1.Columns[2].HeaderText.Append(“,”)
.Append(GridView1.Columns[4].HeaderText.Append(“,”)
.Append(GridView1.Columns[7].HeaderText.Append(“\r\n”);
对于(int i=0;i