Hi all,
I'm trying to create a stand-alone program so we can upload CSV files into a Datagridview.
The issue is when I try to upload tester.csv (Has 10 columns with 2 rows, including header row) I get an Exception error: "Empty path name is not legal." Then when I go back into the openfiledialog browse window, the file extension isn't there. I am able to manually add it in and then everything works for the program.
Anyone have any thoughts?? The code is below.
public partial class CSVtoNATCHA : Form { public CSVtoNATCHA() { InitializeComponent(); } private string readFile(string filePath) { try { StreamReader streamReader = new StreamReader(filePath); //Sets the StreamReader return streamReader.ReadToEnd(); // Opens and reads the file to be updated. } catch (Exception e) //Shows the error if the StreamReader fails. { MessageBox.Show(e.Message, "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error); return e.Message.ToString(); } } //Helper method to generate the uploaded file into the datagridview private DataTable generateDataTableFromCSV(string fileContent) { DataTable dt = new DataTable(); string[] row = fileContent.Split("\r\n".ToCharArray()); string rowstr = row[0]; string[] col = rowstr.Split(','); int colCount = 1; foreach (string colstr in col) { dt.Columns.Add(new DataColumn("Column" + colCount)); colCount++; } dt.AcceptChanges(); return dt; } public void btnBrowse_Click(object sender, EventArgs e) { // Start new instance of the OpenFileDialog controller //OpenFileDialog ofd = new OpenFileDialog(); // Declare local variables. string file = @ofd.FileName; //Filter to only show CSV files to upload ofd.Filter = "CSV Files (*.csv)|*.csv"; //Set ofd title ofd.Title = "Browse to upload CSV"; // Show dialog to allow user to open a file. bool? userClickedOK = ofd.ShowDialog() == DialogResult.OK; if (userClickedOK == true) { string fileName = ofd.FileName; txtFile.Text = file.ToString(); //Shows the string path inside the textbox that is being uploaded to datagridview. readFile(file); //pass the File uploaded string to the method csvUpload(file); //pass the File uploaded string to the method } } //helper method for when the csv file is uploaded. private string csvUpload(string csvFile) { string csvUpload = csvFile; return csvUpload; //will return the string path of the file being uploaded. } private void btnExport_Click(object sender, EventArgs e) { MessageBox.Show("Currently a work in progress.", "In Progress", MessageBoxButtons.OK, MessageBoxIcon.Exclamation); } private void closeToolStripMenuItem_Click(object sender, EventArgs e) { //Closes the program. this.Close(); } private void aboutToolStripMenuItem_Click(object sender, EventArgs e) { //Shows help information MessageBox.Show("This app will allow us to upload a CSV file and export it as NACHA format.\n\nVersion: 1.0\nBeta Version", "About app", MessageBoxButtons.OK, MessageBoxIcon.Information); } private void btnUpload_Click(object sender, EventArgs e) { // MessageBox.Show("Function coming soon.", "Not ready yet", MessageBoxButtons.OK, MessageBoxIcon.Information); string fileContent = this.readFile(ofd.FileName); DataTable dt = this.generateDataTableFromCSV(fileContent); string[] row = fileContent.Split("\r\n".ToCharArray()); foreach (string rowstr in row) { DataRow myRow = dt.NewRow(); int colCount = 0; string[] col = rowstr.Split(','); foreach (string colstr in col) { myRow[colCount] = colstr; colCount++; } dt.Rows.Add(myRow); } gvData.DataSource = dt; } }
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Allen D.
