将guid转换为字符串，反之亦然 [英] converting guid to string and vice- versa

问题描述

大家好

我有一个标签lblUID，我正在其中填充具有数据类型唯一标识符的db表的id.如何将lblUID.Text从Guid转换为字符串，然后再次将字符串转换为Guid.以及如何检查其是否为空，如IsNullOrEmpty in字符串?我必须使用此方法-

hey everyone

I have a label lblUID on which i am populating id of db table which has data type unique identifier.How can i convert lblUID.Text from Guid to string and again string to Guid.And how to check whether its empty or not like IsNullOrEmpty in string?i have to use this method--

if (RadGrid1.SelectedItems.Count != 0)
            {
                txtItemNamePanel.Focus();
                pnlExternalForm.Visible = true;
                RadGrid Grid = (this.FindControl("RadGrid1") as RadGrid);
                string Pid = Convert.ToString(Grid.SelectedValues["Pid"]);
                string query = "SELECT * FROM tblProducts where Pid=" + Pid;
                GetProductInfoForEdit(query, Pid);
                BindGrid();
            }

除了我用UID代替唯一标识符pid之外.
lblIdPanel.Text = ProductId;应该等于UID.

谢谢
Amit

except for i have UID in place of pid that is unique identifier.
lblIdPanel.Text = ProductId; should be equal to UID.

Thanks
Amit

推荐答案

我的意思是:

i mean:

<pre>string str = "cd7fc78e-de3c-4761-9192-4cfb7a6088e5";
            Guid g = new Guid(str);

检查Guid对象是否为空.

Check to see if the Guid object is null.

Guid guid = Guid.NewGuid();
if (quid == null)
{
  // do something
}

要将其转换为字符串(将参数传递给ToString()方法会导致以特定方式设置返回值的格式，请参见此处:

To convert it to a string (passing paramneters to the ToString() method causes the returned value to formatted in specific ways see here: http://msdn.microsoft.com/en-us/library/97af8hh4.aspx[^]):

string myGuid = guid.ToString();

要将字符串转换为GUID:

To convert a string to a guid:

Guid guid = new Guid(myguidstring);

如果您用Google搜索过，就会发现以下内容:

http://msdn.microsoft.com/en-us/library/system.guid.aspx [^ ]

它只需要一点点主动性和常识，即可节省大量时间等待别人回答您​​的问题.

If you had googled it, you would have found this:

http://msdn.microsoft.com/en-us/library/system.guid.aspx[^]

All it takes is a little initiative and common sense to save yourself buttloads of time waiting for someone to answer your question.

lblIdPanel.Text = ProductId.ToString();

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