Question

我有1个带有1个文本框的Windows窗体，用户将在其中键入ProductId，按Enter键，然后将基于该产品添加到gridview。

现在，当将新行添加到gridview时，我想为每行添加文本框，但是问题是我可以看到单元格不可编辑并且文本框未生成。

代码：

private void txtProductId_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Enter)
        {
            string pathName = txtFilePath.Text;
            string fileName = System.IO.Path.GetFileNameWithoutExtension(txtFilePath.Text);
            DataTable tbContainer = new DataTable();
            string strConn = string.Empty;
            string sheetName = fileName;

            FileInfo file = new FileInfo(pathName);
            if (!file.Exists) { throw new Exception("Error, file doesn't exists!"); }
            string extension = file.Extension;

            switch (extension)
            {
                case ".xls":
                        strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathName + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
                        break;
                case ".xlsx":
                        strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + pathName + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1;'";
                        break;
                default:
                        strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathName + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
                        break;
            }
            string fieldSelector = "[ProductID], [ProductName], [MRP] ";
            string query = $"SELECT {fieldSelector} FROM [{sheetName}$A1:F15535] WHERE [ProductID] = {Convert.ToInt32(txtProductId.Text)}";
            using (OleDbConnection cnnxls = new OleDbConnection(strConn))
                using (OleDbDataAdapter oda = new OleDbDataAdapter(query, cnnxls))
                {
                    oda.Fill(tbContainer);
                    DataGridViewTextBoxColumn textboxColumn = new DataGridViewTextBoxColumn();
                    grdProductList.Columns.Add(textboxColumn);
                }
            e.Handled = true;
        }
    }

更新

在最后一列中，我希望允许用户在考虑每个产品折扣的文本框中添加最终金额。

Answer 1

尝试以下操作，它应该绑定并显示xls / xlsx工作表中的结果，并根据要求添加文本框列。

private void txtProductId_KeyUp(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        var pathName = txtFilePath.Text;
        var sheetName = Path.GetFileNameWithoutExtension(pathName);
        var tbContainer = new DataTable();
        var bindingSource = new BindingSource();  //Initiate new binding source
        var fieldSelector = "[ProductID], [ProductName], [MRP]";
        var query = $"SELECT {fieldSelector} FROM [{sheetName}$A1:F15535] WHERE [ProductID] = {Convert.ToInt32(txtProductId.Text)}";

        if (!File.Exists(pathName)) throw new Exception("Error, file doesn't exists!");

        grdProductList.AllowUserToAddRows = false;  //Prevent user from adding new rows
        grdProductList.DataSource = bindingSource;  //Link the binding source to your dgview

        using (var cnnxls = new OleDbConnection(MsXlConnStr(pathName)))
            using (var oda = new OleDbDataAdapter(query, cnnxls))
                oda.Fill(tbContainer);

        tbContainer.Columns.Add("Discount", typeof(Int32)); //<-- Editable discount column
        bindingSource.DataSource = tbContainer;  //Display collected results in dgView     

        e.Handled = true;
    }
}

private string MsXlConnStr(string pathName)
{
    return new FileInfo(pathName).Extension.ToLower().Contains(".xlsx") ? 
        "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + pathName + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1;'" : 
        "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathName + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
}

注意：：我对代码进行了一些缩短和清理，但是我建议使用try catch换行以捕获其他任何异常。

将文本框添加到datagridview的每一行的问题

更新

1 个答案: