C # DataGridView Reading marks for specified line text bold

When you use the DataGridView control to place information such as notifications, you encounter an issue that marks "read", "unread." In the results queried by the SQL statement, read and unread are placed in a dedicated field (DataGridView column) to mark the reading of this entry. The goal of this article is to differentiate the current user's read and unread entries on display.

1. Preparatory work

Build a C # form application that puts a dock property set to full DataGridView

2. Program code

In the load function, the simulation generates a data source, and the code that handles the DataGridView display state is placed in the DataSourceChanged event, which refreshes the display state of DataGridView whenever DataSource is re-assigned. Determines whether the row data is read by the value of the Isread column in the code

using system;using system.collections.generic;using system.componentmodel;using  system.data;using system.drawing;using system.linq;using system.text;using  System.text.regularexpressions;using system.threading.tasks;using system.windows.forms;namespace  test{    public partial class FormMain : Form     {        public formmain ()          {             InitializeComponent ();        }         private void formmain_load (object sender, eventargs e)          {            //Generating a data source           &Nbsp; datatable dttestdata = new datatable ();             dttestdata.columns.add ("Title");             dttestdata.columns.add ("Content");             dttestdata.columns.add ("Isread");             dttestdata.rows.add ("Title 1",  "Body 1",  true);             dttestdata.rows.add ("Title 2",  "Body 2",  false);             dttestdata.rows.add ("Title 3",  "Body 3",  true);             dttestdata.rows.add ("Heading 4",  "Body 4",  false);             dttestdata.rows.add ("Heading 5" ,  "Body 5",  true);             this.dgvtestdata.datasource =  dttestdata;        }        // Changes in data sources in/ <summary>        ///  data sheets          /// </summary>        ///  <param name= "Sender" ></param>        ///  <param name= "E" ></param>        private void  dgvtestdata_datasourcechanged (object sender, eventargs e)          {            for  (int  i = 0; i < dgvtestdata.rows.count; i++)              {                 String isread = dgvtestdata.rows[i]. cells["Isread"]. Value.tostring ();                 if  (Isread.tolower (). Trim ()  ==  "true")                  {                     //TODO  Read Processing                      dgvtestdata.rows[i]. defaultcellstyle.forecolor = color.black;                     dgvtestdata.rows[i]. Defaultcellstyle.backcolor = color.white;       &nbSp;            dgvtestdata.rows[i]. defaultcellstyle.font =                          new font ("The song Body", 9F,  Fontstyle.regular);                 }                else                 {                     // todo  non-read processing                      dgvtestdata.rows[i]. defaultcellstyle.forecolor = color.black;                     dgvtestdata.rows[i]. defaultcellstyle.backcolor = color.white;                     dgvtestdata.rows[i]. defaultcellstyle.font =                          new font ("The song Body", 9F,  Fontstyle.bold | fontstyle.underline);                 }            }         }    }}

If you do not need to work on a row, but only need to make a style change to a cell, you can write it as follows:

Dgvtestdata.rows[i]. cells["XXX"]. Style.forecolor = Color.black;dgvtestdata.rows[i]. cells["XXX"]. Style.backcolor = Color.white;dgvtestdata.rows[i]. cells["XXX"]. Style.font = new Font ("Arial", 9F, Fontstyle.regular);

3. Running the sample

Determines whether the specified row is bold and underlined, based on the value of the Isread column, such as:

END

C # DataGridView Reading marks for specified line text bold