Replace NULL in querystring asp.net

Question

I have a Response.Redirect on a buttonclick with two querystring-parameters that hold the value from two textboxes. If I leave the textboxes empty I get this URL: /Order.aspx?LastName=&FirstName=. I want to replace the NULL value with "%20" like this /Order.aspx?LastName=%20&FirstName=%20.

Please help my with the if-statements to changes this, I'm really new to this. Here is my code:

protected void btnSearchFirstLastName_Click(object sender, EventArgs e)
{
    Response.Redirect("~/Order.aspx?LastName=" + SearchLastName.Text.Trim() + "&FirstName=" + SearchFirstName.Text.Trim());
}

Satpal · Accepted Answer · 2013-08-14 13:13:39Z

2

Check string using string.IsNullOrEmpty, if true then set something of your choice like " " or string.Empty.

protected void btnSearchFirstLastName_Click(object sender, EventArgs e)
{
    Response.Redirect("~/Order.aspx?LastName=" 
    + string.IsNullOrEmpty(SearchLastName.Text) ? " ": SearchLastName.Text.Trim() 
    + "&FirstName=" + string.IsNullOrEmpty(SearchFirstName.Text) ? " " : SearchFirstName.Text.Trim());
}

answered Aug 14, 2013 at 13:13

Satpal

134k13 gold badges168 silver badges171 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Jason Evans · Accepted Answer · 2013-08-14 13:13:56Z

2

protected void btnSearchFirstLastName_Click(object sender, EventArgs e)
{
    string firstName = "%20";
    string lastName = "%20";

    if (!string.IsNullOrWhitespace(SearchFirstName.Text)
        firstName = SearchFirstName.Text.Trim();

    if (!string.IsNullOrWhitespace(SearchLastName.Text)
        lastName = SearchLastName.Text.Trim();

    Response.Redirect("~/Order.aspx?LastName=" + lastName + "&FirstName=" + firstName);
}

answered Aug 14, 2013 at 13:13

Jason Evans

29.2k16 gold badges95 silver badges157 bronze badges

1 Comment

Jason Evans Over a year ago

No probs, glad to help :)

Iti Tyagi · Accepted Answer · 2013-08-14 13:13:07Z

0

I think you can simply add this condition that if textbox is empty, then text should be as mentioned by you. Like:

If(abc.text!=string.empty || abc.text!=null)
{
param value=abc.text;
}
else
param value="%20";

Note: This is a side option, you can opt if coding paradigms is not a concern here.

answered Aug 14, 2013 at 13:13

Iti Tyagi

3,7018 gold badges53 silver badges82 bronze badges

Collectives™ on Stack Overflow

Replace NULL in querystring asp.net

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related