How can I replace word through programming using winform C#

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There is one DataGridView. It has three columns (stdName, Demand, Msg)

Now I want to replace the stdName with "&&" and Demand with "$$" where it is presenting in the sentence.

I have one RichtextBox. It is holding a sentence i.e. Dear Parents, Your ward && fee Rs. "$$" has not been deposited.

Gridview
===========================================
stdName | Message | Demand
===========================================
Rahul | 500 |
Sonu | 450 |
Monu | 600 |
=============================================

After replacement it should show in demand column
================================================================================
Demand
================================================================================
Dear Parents, Your ward Rahul fee Rs. 500 has not been deposited.
Dear Parents, Your ward Sonu fee Rs. 450 has not been deposited.
Dear Parents, Your ward Monu fee Rs. 600 has not been deposited.
========================================================================

What I have tried:

..............................................

Posted 25-Oct-16 22:36pm

nityanand NCR

Updated 25-Oct-16 22:38pm

Nelek

v2

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OriginalGriff · Accepted Answer · 2016-10-25T23:11:00

Try:

C#

string template = myRichTextBox.Text;
foreach (DataGridViewRow row in myDataGridView2.Rows)
    {
    string demand = template;
    object stdName = row.Cells["stdName"].Value;
    object message = row.Cells["Message"].Value;
    if (!string.IsNullOrWhiteSpace(demand) && stdName != null && message != null)
        {
        demand = demand.Replace("&&", stdName.ToString());
        demand = demand.Replace("$$", message.ToString());
        row.Cells["demand"].Value = demand;
        }
    }