entityMap|blocks|key|8afb|text|您可以将获取id的代码移动到属性中，例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|dpi9j|protected+void+Button2_Click(object+sender,+EventArgs+e)
{
++++string+id+=+SelectedId;
}

private+string+SelectedId+
{
++get
++{
++++GridViewRow+row+=+GridView1.SelectedRow;
++++return+row?.Cells[3].Text;+//+Please+note+the+check+against+null+(row?)
++}
}|code-block|syntax|javascript|825me^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|J|9|@]|A|@]|B|$F|G]]|$2|H|4|-4|6|7|8|K|9|@]|A|@]|B|$]]]]

You can move the code that gets the id to a property, e.g.:

<pre><code>protected void Button2_Click(object sender, EventArgs e)
{
 string id = SelectedId;
}

private string SelectedId 
{
 get
 {
 GridViewRow row = GridView1.SelectedRow;
 return row?.Cells[3].Text; // Please note the check against null (row?)
 }
}
</code></pre>

entityMap|blocks|key|6fksi|text|使用session代替在函数内部初始化字符串，它将存储您的值，并且您可以在代码中的任何位置访问它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4e2ui|protected+void+Button2_Click(object+sender,+EventArgs+e)
{
++++lblanything.Text+=+Session["id"].ToString();
}

protected+void+GridView1_SelectedIndexChanged(object+sender,+EventArgs+e)
{
++++GridViewRow+row+=+GridView1.SelectedRow;
++++Session["id"]+=+row.Cells[3].Text;
}|code-block|syntax|javascript|5r100|希望它能解决你的问题。|e40id^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|K|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|L|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|M|9|@]|A|@]|B|$]]|$2|J|4|-4|6|7|8|N|9|@]|A|@]|B|$]]]]

Instead of initializing String inside the function, Use session, it'll store your value and you can access it anywhere in the code. 

<pre><code>protected void Button2_Click(object sender, EventArgs e)
{
 lblanything.Text = Session["id"].ToString();
}

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
 GridViewRow row = GridView1.SelectedRow;
 Session["id"] = row.Cells[3].Text;
}
</code></pre>

Hope it'll resolve your issue.

entityMap|blocks|key|50fdt|text|可以将字符串值保存在视图状态中，然后尝试访问该值。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|g25m|//Setting+the+ViewState+
++++protected+void+MyGridView_SelectedIndexChanged(object+sender,+EventArgs+e)
++++{
++++++++GridViewRow+row+=+MyGridView.SelectedRow;
++++++++ViewState["id"]+=+row.Cells[3].Text;
++++}

+//Assigning+the+ViewState+
++++protected+void+MyButton_Click(object+sender,+EventArgs+e)
++++{
++++++++lable1.Text+=+ViewState["id"].ToString();
++++}|code-block|syntax|javascript|631b0^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|J|9|@]|A|@]|B|$F|G]]|$2|H|4|-4|6|7|8|K|9|@]|A|@]|B|$]]]]

You can save the string value in a Viewstate and then try to access the value.

<pre><code>//Setting the ViewState 
 protected void MyGridView_SelectedIndexChanged(object sender, EventArgs e)
 {
 GridViewRow row = MyGridView.SelectedRow;
 ViewState["id"] = row.Cells[3].Text;
 }

 //Assigning the ViewState 
 protected void MyButton_Click(object sender, EventArgs e)
 {
 lable1.Text = ViewState["id"].ToString();
 }
</code></pre>

entityMap|blocks|key|9p16d|text|最简单的是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|8i9qc|将Button2设置为在启动时禁用...|6tmgo|protected+void+Button2_Click(object+sender,+EventArgs+e)
{
++++string+id+=+GridView1.SelectedRow.Cells[3].Text;
}

//+only+allow+the+button+to+be+enabled+if+there+is+a+selected+row
protected+void+GridView1_SelectedIndexChanged(object+sender,+EventArgs+e)
{++++++++
++++if+(GridView1.SelectedRow+!=+null){
++++++++Button2.Enabled+=+true;
++++}+else+{
++++++++Button2.Enabled+=+false;
++++}
}|code-block|syntax|javascript|d75rd^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|K|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|L|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|M|9|@]|A|@]|B|$H|I]]|$2|J|4|-4|6|7|8|N|9|@]|A|@]|B|$]]]]

The simplest would be:

Set Button2 to be disabled at start and...

<pre><code>protected void Button2_Click(object sender, EventArgs e)
{
 string id = GridView1.SelectedRow.Cells[3].Text;
}

// only allow the button to be enabled if there is a selected row
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{ 
 if (GridView1.SelectedRow != null){
 Button2.Enabled = true;
 } else {
 Button2.Enabled = false;
 }
}
</code></pre>

I need to save the sting i get from selecting a row to be used in a button protected void.

<pre><code>protected void Button2_Click(object sender, EventArgs e)
{
 string = id &lt;= how to get the string here?
}

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
 GridViewRow row = GridView1.SelectedRow;
 string id = row.Cells[3].Text;
}
</code></pre>

How to make string accessible to a button?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我需要保存通过选择要在按钮保护的void中使用的行而得到的刺痛。 protected void Button2_Click(object sender, EventArgs e){ string = id <= how to get the string here?}protected void GridVie...

问如何使字符串可被按钮访问？
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问如何使字符串可被按钮访问？EN