C#如何向數組中添加元素

Question

我有一個生成大約 150 個唯一字符串的循環。 如何將這些字符串添加到數組中？

這是我的循環：

for (int intCounter = 0; intCounter < projectCount; intCounter ++)
{
    var projectname = project.value[intCounter].name;
    var releaseUri = "http://tfs1:8080/tfs/defaultcollection/" + projectname + "/_apis/release/releases?api-version=3.0-preview.2&searchText=911&minCreatedTime=" + date + "T00:00:00.00Z";
    Console.WriteLine(releaseUri);
}

Console.WriteLine(releaseUri)打印每個 url。 但我想將 releaseUri 存儲在一個數組中。

Answer 1

列表通常比數組好。

    var releaseUris = new List<string>();
    foreach(var project in projects)
    {
        var releaseUri = $"http://tfs1:8080/tfs/defaultcollection/" + project.projectname + "/_apis/release/releases?api-version=3.0-preview.2&searchText=911&minCreatedTime=" + project.date + "T00:00:00.00Z";
        releaseUris.Add(releaseUri);
    }

Answer 2

@ShaneP，

您需要像這樣在 for 循環之外聲明一個數組。

string[] releaseUriArray = new string[projectCount];

for (int intCounter = 0; intCounter < projectCount; intCounter ++)
{
    var projectname = project.value[intCounter].name;
    var releaseUri = "http://tfs1:8080/tfs/defaultcollection/" + projectname + "/_apis/release/releases?api-version=3.0-preview.2&searchText=911&minCreatedTime=" + date + "T00:00:00.00Z";
    // Here you are adding the releaseUri strings to the releaseUriArray
    releaseUriArray[intCounter] = releaseUri;

} 

// print your uris from the array here
for (int intCounter = 0; intCounter < projectCount; intCounter ++)
{
    var releaseUri = releaseUriArray[intCounter];
    Console.WriteLine(releaseUri);
} 

Answer 3

在這種情況下，您可以使用數組，因為您知道元素的數量。 初始化它並隨時設置項目

var arr = new string[projectCount];
for (int intCounter = 0; intCounter < projectCount; intCounter ++)
{
    var projectname = project.value[intCounter].name;
    var releaseUri = "http://tfs1:8080/tfs/defaultcollection/" + projectname + "/_apis/release/releases?api-version=3.0-preview.2&searchText=911&minCreatedTime=" + date + "T00:00:00.00Z";
    Console.WriteLine(releaseUri);
    arr[intCounter] = releaseUri;
}

Answer 4

如果您現在projectCount那么您可以創建一個具有所需元素編號的數組，並只需按索引設置其項目。

var urls = new string[projectCount];
for (int intCounter = 0; intCounter < projectCount; intCounter ++)
{
    var projectname = project.value[intCounter].name;
    var releaseUri = "http://tfs1:8080/tfs/defaultcollection/" + projectname + "/_apis/release/releases?api-version=3.0-preview.2&searchText=911&minCreatedTime=" + date + "T00:00:00.00Z";
    urls[i] = releaseUri;
}

或者您可以只使用動態數組並使用Add()方法添加元素，以便能夠在初始化后更改數組大小。

var urls = new List<string>();
for (int intCounter = 0; intCounter < projectCount; intCounter ++)
{
    var projectname = project.value[intCounter].name;
    var releaseUri = "http://tfs1:8080/tfs/defaultcollection/" + projectname + "/_apis/release/releases?api-version=3.0-preview.2&searchText=911&minCreatedTime=" + date + "T00:00:00.00Z";
    urls.Add(releaseUri);
}

此外，您無需使用循環，只需使用LINQ 1 串代碼即可解決您的問題：

var urls = project
              .value
              .Select(p => "http://tfs1:8080/tfs/defaultcollection/" + p.projectname + "/_apis/release/releases?api-version=3.0-preview.2&searchText=911&minCreatedTime=" + date + "T00:00:00.00Z")
              .ToArray();

Answer 5

一種簡單的方法是創建一個模板 Uri，其中包含項目名稱和日期的占位符（在字符串中使用{0}和{1} ），然后使用一些Linq擴展方法（ Select和ToList ）和string.Format ，您可以從Enumerable.Range生成字符串：

// Project name and date will be inserted where {0} and {1} are below
string uriTemplate = "http://tfs1:8080/tfs/defaultcollection/{0}/_apis/release/" +
    "releases?api-version=3.0-preview.2&searchText=911&minCreatedTime={1}T00:00:00.00Z";

string[] releaseUris = Enumerable.Range(0, projectCount)
    .Select(i => string.Format(uriTemplate, project.value[i], date))
    .ToArray();

Answer 6

列表會更好，因為您不知道要處理多少個項目。 看起來像這樣的List<String> myList = new List<String>(); 然后只需myList.Add(releaseURi);