passing array via query string

Question

I am passing a javascript array via `Request.QueryString["cityID"].ToString()`, but it shows me an error of "invalid arguments": ``` blObj.addOfficeOnlyDiffrent(Request.QueryString["cityID"].ToString(), Request.QueryString["selectTxtOfficeAr"].ToString()); ``` The method declaration looks like: ``` public string addOfficeOnlyDiffrent(string[] cityID, string selectTxtOfficeAr) { } ```

Accepted Answer

Your method `addOfficeOnlyDiffrent` is expecting a string array arguement in `cityID` whereas you are passing a single `string` type object to your method in call. I believe your `cityID` is a single string so you can remove the array from the method declaration. In your method call.

```
Request.QueryString["cityID"].ToString()
```

the above represents a single string, not a string array.

If your query string contains a string array, then values are probably in string representation, separated by some character, for example `,`. To pass that string to the method, you can call `string.Split` to split the string to get an array.

EDIT: From your comment, that your query string contains:

```
Request.QueryString["cityID"].ToString() (123456,654311,987654) 
```

You can do the following.

```
string str = Request.QueryString["cityID"].ToString();
string[] array = str.Trim('(',')').Split(',');
blObj.addOfficeOnlyDiffrent(array,
                            Request.QueryString["selectTxtOfficeAr"].ToString());
```

passing array via query string

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