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private string fileName="XX";
protected void Page_Load(object sender, System.EventArgs e)
{
if (!Page.IsPostBack)
{
FileName= "1";
}
}
protected void btnAddBusiness_Click(object sender, EventArgs e)
{
Response.Write(this.FileName);
}
private string fileName="XX";
protected void Page_Load(object sender, System.EventArgs e)
{
if (!Page.IsPostBack)
{
ViewState["FileName"]= "1";
}
}
protected void btnAddBusiness_Click(object sender, EventArgs e)
{
Response.Write(this.FileName);
}
private string fileName;
public string FileName
{
get { return ViewState["FileName"]; }
set { ViewState["FileName"]= value; }
}
protected void Page_Load(object sender, System.EventArgs e)
{
if (!Page.IsPostBack)
{
ViewState["FileName"]= "1";
}
}
protected void btnAddBusiness_Click(object sender, EventArgs e)
{
Response.Write(this.FileName); // 怎么点击按钮后 fileName 变成null 了?
}