I have loaded the data from database to datagridview and have two columns target value and volume where volume >target value that volume cell should be in green color and volume < target value then volume should be in red color. I tried it but I am not able to do it.
private void dataGridView1_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
if (dataGridView1.Rows.Count > 0 && dataGridView1.Columns.Count > 0)
{
foreach (DataGridViewRow r in dataGridView1.Rows)
{
if (Volume > target value)
{
cell.Style.BackColor = Color.AliceBlue;
}
This question is related to
c#
winforms
datagridview
The answer is
private void dataMain_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
if (dataMain.Columns[e.ColumnIndex].Name == "colStatus")
{
if (int.Parse(e.Value.ToString()) == 2)
{
dataMain.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.OrangeRed;
dataMain.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.White;
}
}
}
Let's say you have to color certain cell (not all cells of the row) by knowing two things:
- Name or index of the column.
- Value which is gonna be inside of the cell.
In thas case you have to use event CellFormatting
In my case I use like this
private void DgvTrucksMaster_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
foreach (DataGridViewRow row in dgvTrucksMaster.Rows)
{
if (Convert.ToInt32(row.Cells["Decade1Hours"].Value) > 0)
{
row.Cells["Decade1Hours"].Style.BackColor = Color.LightGreen;
}
else if (Convert.ToInt32(row.Cells["Decade1Hours"].Value) < 0)
{
// row.DefaultCellStyle.BackColor = Color.LightSalmon; // Use it in order to colorize all cells of the row
row.Cells["Decade1Hours"].Style.BackColor = Color.LightSalmon;
}
}
}
And result you can see here
So here you can access certain cell of the row in column by its name row.Cells["Decade1Hours"]
How do you know this name? Well in my case i create column of DataGridView like this.
var Decade1Hours = new DataGridViewTextBoxColumn()
{
Name = "Decade1Hours",
Width = 50,
DataPropertyName = "Decade1Hours",
ReadOnly = true,
DefaultCellStyle = new DataGridViewCellStyle()
{
Alignment = DataGridViewContentAlignment.MiddleCenter,
ForeColor = System.Drawing.Color.Black,
Font = new Font(font, FontStyle.Bold),
Format = "n2"
},
HeaderCell = new DataGridViewColumnHeaderCell()
{
Style = new DataGridViewCellStyle()
{
Alignment = DataGridViewContentAlignment.MiddleCenter,
BackColor = System.Drawing.Color.Blue
}
}
};
Decade1Hours.HeaderText = "???.1";
dgvTrucksMaster.Columns.Add(Decade1Hours);
And well... you you need for instance colorize some of the cells in the row like ##1 4 5 and 8 you have to use cell index (it starts from 0).
And code will lok like
private void DgvTrucksMaster_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
foreach (DataGridViewRow row in dgvTrucksMaster.Rows)
{
if (Convert.ToInt32(row.Cells[1].Value) > 0 )
{
row.Cells[1].Style.BackColor = Color.LightGreen;
}
}
}
make it simple
private void dataGridView1_cellformatting(object sender,DataGridViewCellFormattingEventArgs e)
{
var amount = (int)e.Value;
// return if rowCount = 0
if (this.dataGridView1.Rows.Count == 0)
return;
if (amount > 0)
e.CellStyle.BackColor = Color.Green;
else
e.CellStyle.BackColor = Color.Red;
}
take a look cell formatting
Surprised no one mentioned a simple if statement can make sure your loop only gets executed once per format (on the first column, of the first row).
private void dgv_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
// once per format
if (e.ColumnIndex == 0 && e.RowIndex == 0)
{
foreach (DataGridViewRow row in dgv.Rows)
if (row != null)
row.DefaultCellStyle.BackColor = Color.Red;
}
}
Kyle's and Simon's answers are gross waste of CPU resources. CellFormatting and CellPainting events occur far too many times and should not be used for applying styles. Here are two better ways of doing it:
If your DataGridView or at least the columns that decide cell style are read-only, you should change DefaultCellStyle of rows in RowsAdded event. This event occurs only once when a new row is added. The condition should be evaluated at that time and DefaultCellStyle of the row should be set therein. Note that this event occurs for DataBound situations too.
If your DataGridView or those columns allow editing, you should use CellEndEdit or CommitEdit events to change DefaultCellStyle.
I know this is an old post, but I found my way here in 2018, so maybe someone else will too. In my opinion, the OP had a better approach (using dgv_DataBindingComplete event) than any of the answers provided. At the time of writing, all of the answers are written using paint events or cellformatting events which seems inefficient.
The OP was 99% of the way there, all they had to do was loop through their rows, test the cell value of each row, and set the BackColor, ForeColor, or whatever other property you want to set.
Please excuse the vb.NET syntax, but I think its close enough to C# that it should be clear.
Private Sub dgvFinancialResults_DataBindingComplete Handles dgvFinancialResults.DataBindingComplete
Try
Logging.TraceIt()
For Each row As DataGridViewRow in dgvFinancialResults.Rows
Dim invoicePricePercentChange = CSng(row.Cells("Invoice Price % Change").Value)
Dim netPricePercentChange = CSng(row.Cells("Net Price % Change").Value)
Dim tradespendPricePercentChange = CSng(row.Cells("Trade Spend % Change").Value)
Dim dnnsiPercentChange = CSng(row.Cells("DNNSI % Change").Value)
Dim cogsPercentChange = CSng(row.Cells("COGS % Change").Value)
Dim grossProfitPercentChange = CSng(row.Cells("Gross Profit % Change").Value)
If invoicePricePercentChange > Single.Epsilon Then
row.Cells("Invoice Price % Change").Style.ForeColor = Color.Green
Else
row.Cells("Invoice Price % Change").Style.ForeColor = Color.Red
End If
If netPricePercentChange > Single.Epsilon Then
row.Cells("Net Price % Change").Style.ForeColor = Color.Green
Else
row.Cells("Net Price % Change").Style.ForeColor = Color.Red
End If
If tradespendPricePercentChange > Single.Epsilon Then
row.Cells("Trade Spend % Change").Style.ForeColor = Color.Green
Else
row.Cells("Trade Spend % Change").Style.ForeColor = Color.Red
End If
If dnnsiPercentChange > Single.Epsilon Then
row.Cells("DNNSI % Change").Style.ForeColor = Color.Green
Else
row.Cells("DNNSI % Change").Style.ForeColor = Color.Red
End If
If cogsPercentChange > Single.Epsilon Then
row.Cells("COGS % Change").Style.ForeColor = Color.Green
Else
row.Cells("COGS % Change").Style.ForeColor = Color.Red
End If
If grossProfitPercentChange > Single.Epsilon Then
row.Cells("Gross Profit % Change").Style.ForeColor = Color.Green
Else
row.Cells("Gross Profit % Change").Style.ForeColor = Color.Red
End If
Next
Catch ex As Exception
Logging.ErrorHandler(ex)
End Try
End Sub
//After Done Binding DataGridView Data
foreach(DataGridViewRow DGVR in DGV_DETAILED_DEF.Rows)
{
if(DGVR.Index != -1)
{
if(DGVR.Cells[0].Value.ToString() == "???????")
{
CurrRType = "???????";
DataGridViewCellStyle CS = DGVR.DefaultCellStyle;
CS.BackColor = Color.FromArgb(0,175,100);
CS.ForeColor = Color.FromArgb(0,32,15);
CS.Font = new Font("Times New Roman",12,FontStyle.Bold);
CS.SelectionBackColor = Color.FromArgb(0,175,100);
CS.SelectionForeColor = Color.FromArgb(0,32,15);
DataGridViewCellStyle LCS = DGVR.Cells[DGVR.Cells.Count - 1].Style;
LCS.BackColor = Color.FromArgb(50,50,50);
LCS.SelectionBackColor = Color.FromArgb(50,50,50);
}
else if(DGVR.Cells[0].Value.ToString() == "???????????")
{
CurrRType = "???????????";
DataGridViewCellStyle CS = DGVR.DefaultCellStyle;
CS.BackColor = Color.FromArgb(175,0,50);
CS.ForeColor = Color.FromArgb(32,0,0);
CS.Font = new Font("Times New Roman",12,FontStyle.Bold);
CS.SelectionBackColor = Color.FromArgb(175,0,50);
CS.SelectionForeColor = Color.FromArgb(32,0,0);
DataGridViewCellStyle LCS = DGVR.Cells[DGVR.Cells.Count - 1].Style;
LCS.BackColor = Color.FromArgb(50,50,50);
LCS.SelectionBackColor = Color.FromArgb(50,50,50);
}
}
}
Without looping it can be achived like below.
private void dgEvents_RowPrePaint(object sender, DataGridViewRowPrePaintEventArgs e)
{
FormatRow(dgEvents.Rows[e.RowIndex]);
}
private void FormatRow(DataGridViewRow myrow)
{
try
{
if (Convert.ToString(myrow.Cells["LevelDisplayName"].Value) == "Error")
{
myrow.DefaultCellStyle.BackColor = Color.Red;
}
else if (Convert.ToString(myrow.Cells["LevelDisplayName"].Value) == "Warning")
{
myrow.DefaultCellStyle.BackColor = Color.Yellow;
}
else if (Convert.ToString(myrow.Cells["LevelDisplayName"].Value) == "Information")
{
myrow.DefaultCellStyle.BackColor = Color.LightGreen;
}
}
catch (Exception exception)
{
onLogs?.Invoke(exception.Message, EventArgs.Empty);
}
}
I may suggest NOT looping over each rows EACH time CellFormating is called, because it is called everytime A SINGLE ROW need to be refreshed.
Private Sub dgv_DisplayData_Vertical_CellFormatting(sender As Object, e As DataGridViewCellFormattingEventArgs) Handles dgv_DisplayData_Vertical.CellFormatting
Try
If dgv_DisplayData_Vertical.Rows(e.RowIndex).Cells("LevelID").Value.ToString() = "6" Then
e.CellStyle.BackColor = Color.DimGray
End If
If dgv_DisplayData_Vertical.Rows(e.RowIndex).Cells("LevelID").Value.ToString() = "5" Then
e.CellStyle.BackColor = Color.DarkSlateGray
End If
If dgv_DisplayData_Vertical.Rows(e.RowIndex).Cells("LevelID").Value.ToString() = "4" Then
e.CellStyle.BackColor = Color.SlateGray
End If
If dgv_DisplayData_Vertical.Rows(e.RowIndex).Cells("LevelID").Value.ToString() = "3" Then
e.CellStyle.BackColor = Color.LightGray
End If
If dgv_DisplayData_Vertical.Rows(e.RowIndex).Cells("LevelID").Value.ToString() = "0" Then
e.CellStyle.BackColor = Color.White
End If
Catch ex As Exception
End Try
End Sub
private void dataGridView1_DataBindingComplete(object sender DataGridViewBindingCompleteEventArgs e)
{
foreach (DataGridViewRow row in dataGridView1.Rows)
{
if (Convert.ToInt32(row.Cells["balaceAmount"].Value) == 0)
{
row.DefaultCellStyle.BackColor = Color.Yellow;
}
else
{
row.DefaultCellStyle.BackColor = Color.White;
}
}
}
foreach (DataGridViewRow row in dgvWebData.Rows)
{
if (Convert.ToString(row.Cells["IssuerName"].Value) != Convert.ToString(row.Cells["SearchTermUsed"].Value))
{
row.DefaultCellStyle.BackColor = Color.Yellow;
}
else
{
row.DefaultCellStyle.BackColor = Color.White;
}
}
This Perfectly worked for me . even if a row is changed, same event takes care.
Source: Stackoverflow.com