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How to fetch values from database in pivot while working with dynamic controls in asp.net c#

I'm Prateek, trying to create an application that takes user inputs from the controls that are being generated dynamically such as a TextBox or a DropDownList.
These controls are generated from the database values itself i.e., I'm storing all the values that are to be created in a table named 'usertasks'.
Now, everything is working fine and controls are dynamically generated, the user inputs are stored in another table named 'taskEntries'. The problem I'm facing is with the values being fetched:
The above image is of a table to save what kind of controls the user wants to create and their labels.
Another image to show how data is being stored right now:
How I want the data to be fetched:
Kindly let me know how do I do it in asp.net c#.
What I tried?
//Below code to get all data into a DataTable
protected void getData()
{
using (SqlConnection con = new SqlConnection(ConnectionManager.ConString))
{
con.Open();
using (SqlDataAdapter sda = new SqlDataAdapter("select (cdate + ', ' + ctime) as 'Date', taskID as 'Task ID', deptID as 'Department ID', empID as 'Employee ID', question as 'Question', userInput as 'Input' from taskEntries", con))
{
DataTable dt = new DataTable();
sda.Fill(dt);
ViewState["dt"] = dt;
BindGrid(dt, false);
}
con.Close();
}
ConvertRowsToColumns();
}
//Below code to bind the gridview
private void BindGrid(DataTable dt, bool rotate)
{
grdUserData.ShowHeader = !rotate;
grdUserData.DataSource = dt;
grdUserData.DataBind();
if (rotate)
{
foreach (GridViewRow row in grdUserData.Rows)
{
row.Cells[0].CssClass = "header";
}
}
}
//Below code to convert the rows to columns
private void ConvertRowsToColumns()
{
DataTable dt = (DataTable)ViewState["dt"];
DataTable dt2 = new DataTable();
for (int i = 0; i <= dt.Rows.Count; i++)
{
String Question = Convert.ToString(dt.Rows[i]["question"]);
String InputType = Convert.ToString(dt.Rows[i]["inputType"]);
dt2.Columns.Add(Question);
dt2.Columns.Add(InputType);
}
for (int i = 0; i < dt.Columns.Count; i++)
{
dt2.Rows.Add();
dt2.Rows[i][0] = dt.Columns[i].ColumnName;
}
for (int i = 0; i < dt.Columns.Count; i++)
{
for (int j = 0; j < dt.Rows.Count; j++)
{
dt2.Rows[i][j + 1] = dt.Rows[j][i];
}
}
BindGrid(dt2, true);
}

Get data from SQL along with read excel in C#

I have a program that are able to import an excel file to datatable binding with datagridview. Currently I need to add another column name InvtID and get that InvtID data from sql server based on Barcode column (column '3' as header) that I have been imported.
How am I able to achieve this one as right now my coding are able to get the data AFTER import an excel, so the InvtID column data are not in side-by-side with Barcode column. This is the only problem I encounter to finish this task, please assist me. Thank you
Here how my datatable looks like
public void filldatagridview(ExcelWorksheet workSheet)
{
DataTable dt = new DataTable();
//Create the data column
for (int col = workSheet.Dimension.Start.Column; col <= workSheet.Dimension.End.Column; col++)
{
dt.Columns.Add(col.ToString());
}
for (int row = 12; row <= 26; row++)
{
DataRow newRow = dt.NewRow(); //Create a row
int i = 0;
for (int col = workSheet.Dimension.Start.Column; col <= workSheet.Dimension.End.Column; col++)
{
newRow[i++] = workSheet.Cells[row, col].Text;
}
dt.Rows.Add(newRow);
}
dt.Columns.RemoveAt(0); //remove No
dt.Columns.RemoveAt(0); //remove article
//Get BookCode
using (SqlConnection conn = new SqlConnection("Server"))
using (SqlCommand cmd = new SqlCommand(null, conn))
{
StringBuilder sb = new StringBuilder("WITH cte AS(SELECT case WHEN InvtID IS NULL OR InvtID='' THEN 'No Bookcode Found' ELSE InvtID END AS InvtID,Barcode,ROW_NUMBER() OVER(PARTITION BY Barcode ORDER BY InvtID Asc) rid FROM InventoryCustomer) SELECT InvtID AS BOOKCODE FROM cte WHERE rid=1 and Barcode In (");
for (int i = 0; i < dt.Rows.Count; i++)
{
if (i != 0) sb.Append(",");
string name = "#P" + i;
cmd.Parameters.AddWithValue(name, dt.Rows[i]["3"]); //"3" is barcode column
sb.Append(name);
}
sb.Append(")");
cmd.CommandText = sb.ToString();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt);
dt.Columns["BOOKCODE"].SetOrdinal(0);
dataGridView2.DataSource = dt;
}
}

I am not sure if this is work.
Avoid adding new row when row is already exists.
Add column first from your dt DataTable
Just take a look at this code:
public void filldatagridview(ExcelWorksheet workSheet)
{
DataTable dt = new DataTable();
DataTable dtInvtID = new DataTable();
dt.Columns.Add("dtInvtID"); //ADDING NEW COLUMN FIRST FOR YOUR dtInvtID
//Create the data column
for (int col = workSheet.Dimension.Start.Column; col <= workSheet.Dimension.End.Column; col++)
{
dt.Columns.Add(col.ToString());
}
for (int row = 12; row <= 26; row++)
{
DataRow newRow = dt.NewRow(); //Create a row
int i = 0;
for (int col = workSheet.Dimension.Start.Column; col <= workSheet.Dimension.End.Column; col++)
{
newRow[i++] = workSheet.Cells[row, col].Text;
}
dt.Rows.Add(newRow);
}
dt.Columns.RemoveAt(0); //remove No
dt.Columns.RemoveAt(0); //remove article
//Get BookCode
using (SqlConnection conn = new SqlConnection("Server"))
using (SqlCommand cmd = new SqlCommand(null, conn))
{
StringBuilder sb = new StringBuilder("WITH cte AS(SELECT case WHEN InvtID IS NULL OR InvtID='' THEN 'No Bookcode Found' ELSE InvtID END AS InvtID,Barcode,ROW_NUMBER() OVER(PARTITION BY Barcode ORDER BY InvtID Asc) rid FROM InventoryCustomer) SELECT InvtID AS BOOKCODE FROM cte WHERE rid=1 and Barcode In (");
for (int i = 0; i < dt.Rows.Count; i++)
{
if (i != 0) sb.Append(",");
string name = "#P" + i;
cmd.Parameters.AddWithValue(name, dt.Rows[i]["3"]); //"3" is barcode column
sb.Append(name);
}
sb.Append(")");
cmd.CommandText = sb.ToString();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dtInvtID);
dt.Columns["BOOKCODE"].SetOrdinal(0);
}
int dtctr = 0;
int ctr = 0;
foreach (DataRow dr in dt.Rows)//inserting the value of your InvtID to dt.Rows
{
dtctr += 1;
ctr = 1;
foreach (DataRow InvtID in dtInvtID.Rows) //Getting the value of dtInvtID from database
{
if (ctr == dtctr)//Condition when the row position is equal (dt.Rows==dtInvtID.Rows) IF THIS NOT RETURN A REAL POSITION THEN YOU CAN RUN IT IN DEBUG MODE T CHECK
{
dr["dtInvtID"] = InvtID[0];
ctr += 1;
break;
}
ctr += 1;
}
}
dataGridView2.DataSource = dt;
}
Reminders:
This code has not tested yet. Any wrong result you can check it and run in Debug Mode.
I've seen some interesting problem:
for (int i = 0; i < dt.Rows.Count; i++)
{
if (i != 0) sb.Append(",");
string name = "#P" + i;
cmd.Parameters.AddWithValue(name, dt.Rows[i]["3"]); //"3" is barcode column
sb.Append(name);
}
sb.Append(")");
Try to Modify it because my answer from above is getting the value of your database. It may cause a redundancy.

you are first inserting new rows into data table with this code.
dt.Rows.Add(newRow);
the second time you are using an adapter to fill the same data table with below code.
da.Fill(dt);
which insert the rows at the end instead of updating the existing rows in the data table.
To align the data into the data table you need to first fill another data table with an adapter then write code using for loop and matching data to update existing or original data table.

how to export to excel with arabic problem

i'm not good in asking sorry
in my windows application , i have a gridview with data , Here i want to export gridview to excel ,I'm trying with below code
i have a problem with my code to export dataGridView to excel sheet i get the result like that (???%$^&$$&$%&$%^$#%##%##%)
i hope any one can help me with that code
i search about it many time and didn't found any answer
have no idea what collation the tables are set to. Is there a way to export the data correctly, or convert it to the correct encoding?
export button
private void Btexport_Click(object sender, EventArgs e)
{
if (dataGridView1.Rows.Count > 0)
{
try
{
// Bind Grid Data to Datatable
DataTable dt = new DataTable();
foreach (DataGridViewColumn col in dataGridView1.Columns)
{
dt.Columns.Add(col.HeaderText, col.ValueType);
}
int count = 0;
foreach (DataGridViewRow row in dataGridView1.Rows)
{
if (count < dataGridView1.Rows.Count - 1)
{
dt.Rows.Add();
foreach (DataGridViewCell cell in row.Cells)
{
dt.Rows[dt.Rows.Count - 1][cell.ColumnIndex] = cell.Value.ToString();
}
}
count++;
}
// Bind table data to Stream Writer to export data to respective folder
StreamWriter wr = new StreamWriter(#"C:\Users\ils\Desktop\New folder (2)\Book1.xls");
// Write Columns to excel file
for (int i = 0; i < dt.Columns.Count; i++)
{
wr.Write(dt.Columns[i].ToString().ToUpper() + "\t");
}
wr.WriteLine();
//write rows to excel file
for (int i = 0; i < (dt.Rows.Count); i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
if (dt.Rows[i][j] != null)
{
wr.Write(Convert.ToString(dt.Rows[i][j]) + "\t");
}
else
{
wr.Write("\t");
}
}
wr.WriteLine();
}
wr.Close();
}
catch (Exception ex)
{
throw ex;
}
}
}
data
public void Disp_data()
{
SqlConnection mycon = new SqlConnection("Data Source=DESKTOP-J7D5POF;Initial Catalog=ilswork;Persist Security Info=True;User ID=test;Password=12345;Connect Timeout=60");
mycon.Open();
SqlCommand cmd = mycon.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select name1 from [dbo].[test5]";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt);
dataGridView1.DataSource = dt;
mycon.Close();
}
private void Form3_Load(object sender, EventArgs e)
{
Disp_data();
}
}

Populate SQL Server data in Excel (2010) spreadsheet

I'm trying to populate the data extracted from SQL Server into Excel 2010. The code below works fine, but the difficulty is that I don't create an Excel spreadsheet programmatically, it is aleady exists and I make a request for data via plugin in Excel written in C#.
Even though I set the cursor to A10 cell, Excel starts filling-out the data from the very first cell and overwrites the header (that is already exists). Please help to fix.
Code:
OdbcConnection cnn;
cnn = new OdbcConnection(azureConn);
using (OdbcCommand command = cnn.CreateCommand())
{
command.CommandText = "{call sp_Get_Excel_Data(?,?,?,?,?,?,?,?)}";
command.Parameters.AddWithValue("#StartDate", startDate);
command.Parameters.AddWithValue("#EndDate", endDate);
command.Parameters.AddWithValue("#startTime", startTime);
command.Parameters.AddWithValue("#endTime", endTime);
command.Parameters.AddWithValue("#smp", smp);
command.Parameters.AddWithValue("#Reg", reg);
command.Parameters.AddWithValue("#event", events);
command.Parameters.AddWithValue("#userId", userId);
cnn.Open();
//DataTable
OdbcDataAdapter adapter = new OdbcDataAdapter(command);
//DataSet
DataSet ds = new DataSet();
adapter.Fill(ds);
//Cast to DataTable
DataTable dataTable = ds.Tables[0];
string[] colNames = new string[dataTable.Columns.Count];
int col = 0;
foreach (DataColumn dc in dataTable.Columns)
colNames[col++] = dc.ColumnName;
w = this.Application.ActiveWorkbook;
ws = (Worksheet)w.ActiveSheet;
Range hdrRow = (Range)ws.Rows[9];
hdrRow.Value = colNames;
hdrRow.Font.Bold = true;
hdrRow.VerticalAlignment = XlVAlign.xlVAlignCenter;
//Position the cursor
var range = ws.get_Range("A10");
range.Select();
//Inserting the Column and Values into Excel file
string data = null;
int i = 0;
int j = 0;
for (i = 0; i <= dataTable.Rows.Count - 1; i++)
{
for (j = 0; j <= dataTable.Columns.Count - 1; j++)
{
data = dataTable.Rows[i].ItemArray[j].ToString();
ws.Cells[i + 2, j + 1] = data;
}
}

Hate to answer my own questions, but here is the solution (with optimized performance):
int column = 1;
foreach (DataColumn c in dataTable.Columns)
{
//Ninth row, starting from the first cell
ws.Cells[10, column] = c.ColumnName;
column++;
}
// Create a 2D array with the data from the data table
int i = 0;
string[,] data = new string[dataTable.Rows.Count, dataTable.Columns.Count];
foreach (DataRow row in dataTable.Rows)
{
int j = 0;
foreach (DataColumn c in dataTable.Columns)
{
data[i, j] = row[c].ToString();
j++;
}
i++;
}
// Set the range value to the 2D array in Excel (10th row, starting from 1st cell)
ws.Range[ws.Cells[11, 1], ws.Cells[dataTable.Rows.Count + 11, dataTable.Columns.Count]].Value = data;

Extract data from datatable

I extract data from all sheets in a workbook using the following code :
foreach (var sheetName in GetExcelSheetNames(connectionString))
{
if (sheetName.Contains("_"))
{
}
else
{
using (OleDbConnection con = new OleDbConnection(connectionString))
{
var dataTable = new DataTable();
string query = string.Format("SELECT * ,{0} as sheetName FROM [{0}]", sheetName);
con.Open();
OleDbDataAdapter adapter = new OleDbDataAdapter(query, con);
try
{
adapter.Fill(dataTable);
ds.Tables.Add(dataTable);
}
catch { }
}
}
I can't just figure how data are stocked in DataTable : sheetname is added as column ? how can I extract it ?
foreach (DataTable dt in ds.Tables)
{
using (SqlConnection con = new SqlConnection(consString))
{
con.Open();
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j ++)
{
//what should I write here ?
}
}
}

In order to get the sheet name, using oledb, you will need to use code that looks something like this (thanks to this SO post and answer):
DataTable dtSheets = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
List<string> sheets= new List<string>();
foreach (DataRow dr in dtSheets.Rows)
{
if (dr["TABLE_NAME"].ToString().Contains("$"))//checks whether row contains '_xlnm#_FilterDatabase' or sheet name(i.e. sheet name always ends with $ sign)
{
sheets.Add(dr["TABLE_NAME"].ToString());
}
}
Below is how you access the values from a datatable:
var someValue = dt.Rows[i][j]
You need to get the item at the column index (j) of the row, at the row index (i), of the current datatable (dt).
Conversely, you can use the name of the column as well.
var someValue = dt.Rows[i]["columnName"]

assuming dt is your datatable variable,
do dt.Rows[row index][column index]
like
dt[2][4] -> will reference the 2nd row, 4th cell
I am not sure, but perhaps the sheetname might be stored at dt.TableName