c# data from datagrid to textbox? - c#

I am creating a program that holds customers details and sends them an email alerting them of special offers. I am having trouble when I export the email data as I want to store it in the sendto.text field separating each address with a comma, How can I get the data from each row of the datagrid and can it be stored and separated with a comma in a textfield?.
Hope this makes sense. Thanks
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
sendto.text = dataGridView1.Rows[i].Cells[3].Value.ToString());
}


Like this?:
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
sendto.text += dataGridView1.Rows[i].Cells[3].Value.ToString() + (i < (dataGridView1.Rows.Count-1) ? "," : "");
}


you can add comma from second emailid onwards.
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
if(i>0)
sendto.text +=","+ dataGridView1.Rows[i].Cells[3].Value.ToString());
else
sendto.text = dataGridView1.Rows[i].Cells[3].Value.ToString());
}


StringBuilder stremail = new StringBuilder();
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
stremail.Append(dataGridView1.Rows[i].Cells[3].Value.ToString() + ",");
}
int stringWithoutLastComma = --stremail.Length;
sendto.text = stremail.ToString(0,stringWithoutLastComma);


You can:
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
sendto.text += string.Format("{0},", dataGridView1.Rows[i].Cells[3].Value.ToString());
}

Related

Output file writing array to the same line

I'm currently trying to write a 2d int array to file. I've gotten it to write the data to file but it all appears on the same line.
Currently its appearing like this:
15101219816911171076171411881213567131441415101069101413878101181210156976139188711571210891267910
But I want it to appear like this:
15,10,12,19,8
16,9,11,17,10
7,6,17,14,11
8,8,12,13,5
6,7,13,14,4
1,4,15,10,10
6,9,10,14,13
8,7,9,10,11
8,12,10,15,6
9,7,6,13,9
18,8,7,11,5
7,12,10,8,9
12,6,7,9,10
This is my code.
{
StreamWriter outputfile;
File.WriteAllText("ClosingStock.Txt", string.Empty);
outputfile = File.AppendText("ClosingStock.Txt");
for (int i = 0; i < (StockColumns); i++)
{
for (int j = 0; j < (StockRows); j++)
{
outputfile.Write(Global_Stock[i , j]);
}
}
outputfile.Close();
}
}
Any help with this problem would be much appreciated. Thanks.

{
StreamWriter outputfile;
string comma = "";
File.WriteAllText("ClosingStock.Txt", string.Empty);
outputfile = File.AppendText("ClosingStock.Txt");
for (int i = 0; i < (StockColumns); i++)
{
for (int j = 0; j < (StockRows); j++)
{
outputfile.Write(comma);
outputfile.Write(Global_Stock[i , j]);
comma = ",";
}
comma = System.Environment.NewLine);
}
outputfile.Close();
}

You should first create a string to write into a file and then write it at once
StringBuilder sb = new StringBuilder();
for (int i = 0; i < (StockColumns); i++)
{
for (int j = 0; j < (StockRows); j++)
{
sb.Append(Global_Stock[i , j]);
sb.Append(",")
}
}
File.WriteAllText("ClosingStock.Txt",sb.ToString());

Just add a new line after each inner loop:
for (int i = 0; i < (StockColumns); i++)
{
for (int j = 0; j < (StockRows); j++)
{
outputfile.Write(Global_Stock[i , j]);
}
outputfile.Write(Environment.NewLine);
}
If I had to guess you should switch StockColumns with StockRows in your loops to have the output you want.
Also, see #Mihir Dave for better implementation of writing a string to a file.

Check duplicate and sum values in datagridview c#

I'm coding like below but it works incorrect.It perform(plus and delete) only 2->3 rows if data has 5->6 duplicate data.
Update and It works
for (int i = 0; i < dataGridView1.RowCount - 1; i++) //compare data
{
var Row = dataGridView1.Rows[i];
string abc = Row.Cells[1].Value.ToString() + Row.Cells[2].Value.ToString().ToUpper();
// MessageBox.Show(abc);
for (int j = i + 1; j < dataGridView1.RowCount; j++)
{
var Row2 = dataGridView1.Rows[j];
string def = Row2.Cells[1].Value.ToString() + Row2.Cells[2].Value.ToString().ToUpper();
if (abc == def)
{
Row.Cells[5].Value = Convert.ToDouble(Row.Cells[5].Value.ToString()) + Convert.ToDouble(Row2.Cells[5].Value.ToString());
dataGridView1.Rows.Remove(Row2);
j--;
}
}
}

This should do the trick for you:
for (int i = 0; i < dataGridView1.RowCount - 1; i++) //compare data
{
var Row = dataGridView1.Rows[i];
string abc = Row.Cells[0].Value.ToString() + Row.Cells[1].Value.ToString().ToUpper();
for (int j = i+1; j < dataGridView1.RowCount; j++)
{
var Row2 = dataGridView1.Rows[j];
string def = Row2.Cells[0].Value.ToString() + Row2.Cells[1].Value.ToString().ToUpper();
if (abc == def)
{
Row.Cells[2].Value = (int)Row.Cells[2].Value + (int)Row2.Cells[2].Value;
dataGridView1.Rows.Remove(Row2);
j--;
}
}
}
You basically need to keep track of j variable as you remove rows from the collection.
If you're a fan of LINQ and don't mind a bit of a convoluted code, here is another approach:
for (int i = 0; i < dataGridView1.RowCount; i++) //compare data
{
var R = dataGridView1.Rows[i];
var V = R.Cells[0].Value.ToString() + R.Cells[1].Value.ToString().ToUpper();
var DupRows = dataGridView1.Rows.Cast<DataGridViewRow>().Skip(i + 1).
Where(r => r.Cells[0].Value.ToString() + r.Cells[1].Value.ToString().ToUpper() == V);
R.Cells[2].Value = (int)R.Cells[2].Value + DupRows.Sum(r => (int)r.Cells[2].Value);
foreach (var DupRow in DupRows)
DupRow.Tag = "Del";
}
for (int i = 0; i < dataGridView1.RowCount; i++)
{
var R = dataGridView1.Rows[i];
if (R.Tag?.ToString() == "Del")
{
dataGridView1.Rows.Remove(R);
i--;
}
}
As a word of advice, this kind of stuff is handled far more easily in the back-end. Whatever your DataGridView is bound to, be it a DataTable or a generic collection, you should implement duplicate removal there instead of directly playing with DataGridView cells.

how to get values from arraylist to Textbox

ArrayList myArrayList = new ArrayList();
for (int i = 0; i <= dt.Rows.Count - 1; i++)
{
for (int j = 0; j <= dt.Columns.Count - 1; j++)
{
myArrayList.Add(dt.Rows[i][j].ToString());
}
}
I want to send a mail to all mail id's which I am storing in array list. How to bind that total array list to a Textbox.

If I understand your question correctly, this code may help you
foreach(object item in myArrayList)
{
TextBoxId.Text += item.ToString();
}
Or you can forget your arrayList, populate TextBox directly while looping in table.
for (int i = 0; i <= dt.Rows.Count - 1; i++)
{
for (int j = 0; j <= dt.Columns.Count - 1; j++)
{
//myArrayList.Add(dt.Rows[i][j].ToString());
TextBoxId.Text += dt.Rows[i][j].ToString();
}
}

ArrayList myArrayList = new ArrayList();
for (int i = 0; i <= dt.Rows.Count - 1; i++)
{
for (int j = 0; j <= dt.Columns.Count - 1; j++)
{
myArrayList.Add(dt.Rows[i][j].ToString());
}
}
StringBuilder strb = new StringBuilder();
foreach (var item in myArrayList)
{
strb.Append(item + ";");
}
You can bind a strb.ToString() to your text box or instead of creating an ArrayList you can directly append email ids from your DataTable to StringBuilder and bind it to your text box.

Why comma(",") is read as dot(".") string?

I have been trying to separate two numbers using "." but in Excel it sets ",". How can I fix it?
int col= 2;
for (int i = 0; i < proc; i++)
{
for (int j = 0; j < mac; j++)
{
wse.Cells[1, col] = (i + 1).ToString()+"." + (j + 1).ToString();
col++;
}
}

Sum datagridview cells with comma generates a format exception

I'm using this code for sum datagridview's cells.
int sum = 0;
for (int i = 0; i < dataGridView1.Rows.Count; ++i)
{
sum += Convert.ToInt32 (dataGridView1.Rows[i].Cells[1].Value);
}
int count_row = dataGridView1.Rows.Count;
label1.Text = (sum.ToString());
The code works well if I just use numbers. However, when I use commas, e.g., 1,34 and 2,20, it says that format exception was unhandled.

it is quite simple, juste do it with decimals.
Decimal sum = 0;
for (int i = 0; i < dataGridView1.Rows.Count; ++i)
{
sum += Convert.Decimal(dataGridView1.Rows[i].Cells[1].Value);
}
int count_row = dataGridView1.Rows.Count;
label1.Text = (sum.ToString());

Modify the line as shown below:
sum += Convert.ToInt32 (dataGridView1.Rows[i].Cells[1].Value.ToString().Replace(",",""));
and it should work with commas as well.

You can do like this:
double sum = 0;
for (int i = 0; i < dataGridView1.Rows.Count; ++i)
{
sum += double.Parse(dataGridView1.Rows[i].Cells[1].Value.ToString().Replace(',','.'));
}
int count_row = dataGridView1.Rows.Count;
label1.Text = (((int)sum).ToString());

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