Problem with If and TextBox - C #

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Problem with If and TextBox - C #

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#1 by (3 votes)

1

My if does not evaluate correctly, I want you to verify that the textbox are not empty or that textbox1 or textbox2 is not "var" , otherwise mark error.

if (textbox1 != "" || textbox1 != "var" && textbox2 != "" || textbox2 != "var" && comboBox1 !=""){        
    MessageBox.Show("Mandar datos");

    } else {
        MessageBox.Show("Error");
    }
}

c#

asked by Ramon Soto Vega 15.05.2017 в 19:37

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1 answer

Error Only the original thread that created a view of the hierarchy can touch its views. on Android Get the customer's date, not the "SERVER" in C #

score 3 · Accepted Answer

the problem is in the order of precedence of the operators

& amp; it is evaluated first and then evaluated ||

if you have:

if (v1 != "" || v1 != "var" && v2 != "" || v2 != "var" && v3 !="")

is evaluated as follows:

if (v1 != "" || (v1 != "var" && v2 != "") || (v2 != "var" && v3 !=""))

and I guess you want me to evaluate it like this:

if ((v1 != "" || v1 != "var") && (v2 != "" || v2 != "var") && (v3 !=""))

If you are not sure of the order of precedence use parentheses to make sure.