How to get the data of a specific column from an excel file? - asp.net

Question

Hi I've an excel file which looks like this
id name age phne no and like this i have 35 columns.........
I'm using a webapplication for this in which I've a fileupload control,a button and two textboxes
fileuploadcontrol
button
textbox1
textbox2
Now when I upload the excel file on button click it should read complete file .........
and when I enter the required column in the textbox1 I get those column details only its like this
textbox1(c1,c4,c5,c30) I sholud get only those column details and in the other text box if I enter the location to be saved it should be saved in that location can any one help me with this I had finished till file uploading and reading.....all I need is how to evaluate those textboxes to get my required data
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
if (FileUpload1.PostedFile.ContentType == "application/xlsx")
{
path = Server.MapPath(".") + "\\inputfiles\\" + Guid.NewGuid() + FileUpload1.FileName;
FileUpload1.PostedFile.SaveAs(path);
Label1.Text = "File Uploaded Successfully...";
StreamReader reader = new StreamReader(FileUpload1.FileContent);
string text = reader.ReadToEnd();
}
else
Label1.Text = "Upload .xlsx File";
}
else
Label1.Text = "Upload file";
}

Answer 1

Check this:
Read and Display Data From an Excel File (.xsl or .xlsx) in ASP.NET
You can specify what columns you need to read on select query.
Regards

Answer 2

I got the answer myself .......ty for tryin to helpin me m postin my code if any needs in any case........
protected void btns_Click(object sender, EventArgs e)
{
string path = string.Empty;
location = Textbox2.Text;
if (fup1.HasFile)
{
try
{
path = Server.MapPath(".") + "\\uploadedfiles\\" + Guid.NewGuid() + fup1.FileName;
fup1.PostedFile.SaveAs(path);
lbl5.Text = "Upload status: File uploaded!";
}
catch (Exception ex)
{
lbl5.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message;
}
excelfile(path);
}
}
void excelfile( string path)
{
string readfile = path;
// initialize the Excel Application class
Excel.Application app = new Excel.Application();
//Excel.Worksheet NwSheet;
Excel.Range ShtRange;
// create the workbook object by opening the excel file.
Excel.Workbook workBook = app.Workbooks.Open(readfile, 0, true, 5, "", "", true, Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
// Get The Active Worksheet Using Sheet Name Or Active Sheet
Excel.Worksheet workSheet = (Excel.Worksheet)workBook.ActiveSheet;
int index = 1;
System.Text.StringBuilder sb = new StringBuilder();
try
{
string[] values = Textbox1.Text.Split(new char[] { ',' });
int[] colindexs = new int[values.Length];
for (int i = 0; i < values.Length; i++)
{
colindexs[i] = Convert.ToInt16(values[i]);
}
while (((Excel.Range)workSheet.Cells[index, 1]).Value2 != null)
{
string str = "";
foreach (int col1 in colindexs)
{
str = str + Convert.ToString(((Excel.Range)workSheet.Cells[index, col1]).Value2) + ",";
}
str = str.Substring(0, str.Length - 1);
sb.Append(str);
sb.Append(Environment.NewLine);
index++;
}
Writetofile(sb.ToString());
ShtRange = workSheet.UsedRange;
}
catch (Exception ex)
{
app.Quit();
lbl5.Text=ex.Message;
}
}
void Writetofile(string content)
{
using (System.IO.StreamWriter sw = new System.IO.StreamWriter(location, true))
{
sw.Write(content);
sw.Flush();
}
}
}