Operator && cannot be applied to operands of type system.drawing.color and bool

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hello, I have a problem with Combine two condition down below, I try many things to use that two condition together but it didn't work, if someone can help me or have some way to solve this I will be hopeful

Thanks..

What I have tried:

C#

if (e.Row.RowType == DataControlRowType.DataRow)
{
	//put your control name here to get and then check for your value
	Label lbl = e.Row.FindControl("Label17") as Label;

	if (lbl.Text == "ملغي Cancled ")
	{
	   e.Row.BackColor = Color.Red && Amount == 0; // -----> Problem is here
		return; //will stop here
	}
}

Posted 6-Aug-17 23:36pm

Learn.net37

Updated 6-Aug-17 23:47pm

Graeme_Grant

v2

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Comments

Graeme_Grant 7-Aug-17 5:41am

Yes, that is a syntax error. What are you attempting to do on the problematic line?

3 solutions

Solution 1

The problem is that "&&" is a boolan operation, and so is "==" - but no combination of operator precedence ends up with the same types on each side of both opertors:

(Color.Red && Amount) == 0

is comparing a bool to an int.

Color.Red && (Amount == 0)

is comparing a Color to a bool.
So the compile complains.
I suspect you meant to use the binary AND:

(Color.Red & Amount) == 0

But without knowing your project, I can't really tell.

Posted 6-Aug-17 23:41pm

OriginalGriff

Comments

Learn.net37 7-Aug-17 5:46am

ok the code for gridview when label = "ملغي Canceled

make the row back colour = red and (amount) that label bind in database = 0 so it will not be calculated and this is code for databound

int Amount = 0;
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{

if (e.Row.RowType == DataControlRowType.DataRow)
{

//put your control name here to get and then check for your value
Label lbl = e.Row.FindControl("Label17") as Label;

if (lbl.Text == "ملغي Cancled ")
{
e.Row.BackColor = (Color.Red & Amount) == 0;
return; //will stop here
}

}
if (e.Row.RowType == DataControlRowType.DataRow)
{
Amount += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "Spare1"));

}
// Display totals in the gridview footer
else if (e.Row.RowType == DataControlRowType.Footer)
{
e.Row.Cells[9].Text = " Grand_Total: " + Amount.ToString("#,##0") + " " + "SAR ";
e.Row.Cells[9].Font.Bold = true;

}

}

Patrice T 7-Aug-17 5:49am

Use Improve question to update your question.
So that everyone can pay attention to this information.

Solution 3

C#

e.Row.BackColor = Color.Red && Amount == 0; // -----> Problem is here

Yes, this code is meaningless, so there is no possible correction because you didn't told us what it is supposed to do.

Quote:<
/div>I have a problem with Combine two condition down below

Color.Red is not a condition.
Explain what you want to do.
[Update]
This have no meaning either:

C#

e.Row.BackColor = (Color.Red & Amount) == 0;

Posted 6-Aug-17 23:46pm

Patrice T

Updated 6-Aug-17 23:51pm

v2

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Graeme_Grant · Accepted Answer · 2017-08-06T23:42:00

Solution 2

Do you mean:

C#

if (e.Row.RowType == DataControlRowType.DataRow)
{
	//put your control name here to get and then check for your value
	Label lbl = e.Row.FindControl("Label17") as Label;
 
	if (lbl.Text == "ملغي Cancled ")
	{
           e.Row.BackColor = Color.Red;
           Amount = 0;
           return;
	}
}

Posted 6-Aug-17 23:42pm

Graeme_Grant

Updated 7-Aug-17 0:22am

v2

Comments

OriginalGriff 7-Aug-17 5:54am

What is "Amount == 0;" supposed to do?

Graeme_Grant 7-Aug-17 6:21am

True ... I should have corrected that also... d-d-d-done...

Learn.net37 7-Aug-17 6:39am

its supposed to make the value 0 , mean it's not calculate with other records

OriginalGriff 7-Aug-17 6:40am

Read it again: "==" is a logical operator, not an assignment operator. That's "="

Graeme_Grant 7-Aug-17 6:47am

Yes, Amount = 0; assigns the value 0 to Amount.