将按钮单击时定义的变量传递给另一个按钮单击c#
我正在编写一个ASP.NET应用程序,只需单击按钮即可完成这些操作将按钮单击时定义的变量传递给另一个按钮单击c#,c#,asp.net,button,directory,unique,C#,Asp.net,Button,Directory,Unique,我正在编写一个ASP.NET应用程序,只需单击按钮即可完成这些操作 使用GUID在App_数据文件夹中创建唯一目录 将exe文件和excel模板复制到唯一目录中 从网页输入中写入txt文件 运行exe文件 exe生成一个输出txt文件 将输出数据放入网页上的asp表中 将txt文件中的输出数据写入excel模板 点击第二个按钮 下载带有数据的唯一excel文件 现在所有涉及的路径都是变量。我想做的是点击第二个按钮,它允许您下载唯一的excel文件,该文件中填充了数据。但是,无论我尝试什么,我都无
public void Button1_Click(object sender, EventArgs e)
{
UniqueDirectory d = new UniqueDirectory();
string dirPath = Request.MapPath("~/App_Data/"); // point to the directory of wispp on the server
string wisppExe = Server.MapPath("~/App_Data/WisppNew.exe"); // point to the location of wispp on the server
string fortranLib = Server.MapPath("~/App_Data/libf60rts.dll"); // point to the location of the fortran libray file on the server
string excelTemplate = Server.MapPath("~/App_Data/WISPP_Template.xls");
do
{
Guid guid = Guid.NewGuid();
string uniqueSubFolderName = guid.ToString();
string uniquePath = dirPath + uniqueSubFolderName;
}
while (Directory.Exists(d.uniquePath));
Directory.CreateDirectory(d.uniquePath);
//copy files to new unique directory
string wisppUnique = Path.Combine(d.uniquePath, "WisppNew.exe");
string fortranUnique = Path.Combine(d.uniquePath, "libf60rts.dll");
string wisppGraphUnique = Path.Combine(d.uniquePath, "WISPPGRA");
string excelUnique = Path.Combine(d.uniquePath, "WISPP_Template.xls");
string excelOutput = Path.Combine(d.uniquePath, "WISPP_Output.xls");
File.Copy(wisppExe, wisppUnique, true);
File.Copy(fortranLib, fortranUnique, true);
File.Copy(excelTemplate, excelUnique, true);
//write data into excel
FileStream outputFile = new FileStream(excelOutput, FileMode.OpenOrCreate, FileAccess.Write);
xssfworkbook.Write(outputFile);
outputFile.Close();
}
public void Button2_Click(object sender, EventArgs e)
{
//here I want to use variable excelOutput
FileInfo file = new FileInfo(excelOutput);
if(file.Exists)
{
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "Application/x-msexcel";
Response.Flush();
Response.TransmitFile(file.FullName);
Response.End();
}
}
希望这是有道理的。我曾尝试将代码的响应部分放在第一个按钮单击中,但由于某种原因,这使得数据表不可见。此外,我希望用户可以选择下载excel文件,因此我理想情况下需要再次单击按钮 您的方法不正确,因为按钮可以按任何顺序单击,但如果您打算按此路线操作,您可以这样做
//hide second button
yourButton2.Visible = false;
public void Button1_Click(object sender, EventArgs e)
{
UniqueDirectory d = new UniqueDirectory();
string dirPath = Request.MapPath("~/App_Data/"); // point to the directory of wispp on the server
string wisppExe = Server.MapPath("~/App_Data/WisppNew.exe"); // point to the location of wispp on the server
string fortranLib = Server.MapPath("~/App_Data/libf60rts.dll"); // point to the location of the fortran libray file on the server
string excelTemplate = Server.MapPath("~/App_Data/WISPP_Template.xls");
do
{
Guid guid = Guid.NewGuid();
string uniqueSubFolderName = guid.ToString();
string uniquePath = dirPath + uniqueSubFolderName;
}
while (Directory.Exists(d.uniquePath));
Directory.CreateDirectory(d.uniquePath);
//copy files to new unique directory
string wisppUnique = Path.Combine(d.uniquePath, "WisppNew.exe");
string fortranUnique = Path.Combine(d.uniquePath, "libf60rts.dll");
string wisppGraphUnique = Path.Combine(d.uniquePath, "WISPPGRA");
string excelUnique = Path.Combine(d.uniquePath, "WISPP_Template.xls");
string excelOutput = Path.Combine(d.uniquePath, "WISPP_Output.xls");
File.Copy(wisppExe, wisppUnique, true);
File.Copy(fortranLib, fortranUnique, true);
File.Copy(excelTemplate, excelUnique, true);
//write data into excel
FileStream outputFile = new FileStream(excelOutput, FileMode.OpenOrCreate, FileAccess.Write);
xssfworkbook.Write(outputFile);
outputFile.Close();
yourButton2.Visible = true;
yourButton2.Click += (_sender, _e) =>
{
//excelOutput is still in scope
FileInfo file = new FileInfo(excelOutput);
if(file.Exists)
{
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "Application/x-msexcel";
Response.Flush();
Response.TransmitFile(file.FullName);
Response.End();
}
};
}
谢谢@metal_man Session的款待。又好又简单 我在定义了唯一的excel路径后添加了这个
Session["excelPath"] = excelOutput;
这是我的按钮
string excelOutput = (string)Session["excelPath"];
关于会话状态的好文章
最简单的方法是使用您在btn1\u单击中设置的全局变量并进入btn2\u单击?使用
会话[“路径”]
,单击第一个按钮后首先分配,单击第二个按钮后仅读取变量。使用此方法,您将仅在单击第一个按钮后为第二个按钮设置按钮单击事件。我还建议在单击第一个按钮之前隐藏第二个按钮。谢谢您的帮助。它几乎起作用了。按钮2在执行上一个代码后出现,但当我单击它时,文件不会下载。当我从Button2.click事件中取出文件时,它可以正常下载。我刚刚运行了一个测试,第二个按钮工作正常。你能用你现在的情况更新你的问题吗?可能还有别的问题。