Find Replace

Question

User-735851359 posted

Hello, 

I am trying to make a Find-Replace structure but it is working partially and giving error:

<form action="" method="post">
    <div>
    Bul:
    <input type="text" name="bul" size="50" >
    </div> 
    <div>
    Değiştir:
    <input type="text" name="degistir" size="50" >
    </div> 
    <div>    
        <input type="submit" name="submit" value="Değiştir">
    </div>
</form>

    var info = data.Query("SELECT WordID, Meaning FROM EnglishWords ORDER BY WordID").ToList();  
if(IsPost){
    var bul = Request["bul"];
    var degistir = Request["degistir"];
    var w = "";
    foreach(var word in info){
        if(word.Meaning.Contains(bul)){
            w = word.Meaning.Replace(bul, degistir);
            var sqlQ2 = "UPDATE EnglishWords SET Meaning=@0 WHERE WordID=@1 ";
            var res = data.Execute(sqlQ2, w, word.WordID);
        }
    }

The Error:

Exception Details: Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: Cannot perform runtime binding on a null reference

Line 9:          if(word.Meaning.Contains(bul)){

Answer 1

User-1716253493 posted
Make sure Request["bul"] is not null, if null set bul with empty string.

Answer 2

User-735851359 posted

I imported a text with non-English characters and there non englısh characters are distorted while importing. I am trying to replace them forexample.

Д±

with 

ı

Can the Request command accept that as Empty?

Answer 3

User-821857111 posted

foreach(var word in info){
    if(word.Meaning != null){
        if(word.Meaning.Contains(bul)){
            w = word.Meaning.Replace(bul, degistir);
            var sqlQ2 = "UPDATE EnglishWords SET Meaning=@0 WHERE WordID=@1 ";
            var res = data.Execute(sqlQ2, w, word.WordID);
        }
    }
}