前台 <asp:Button ID="btnAddBusiness" Width="120px" runat="server" OnClick="btnAddBusiness_Click" Text="Submit" />
public string fileName;
protected void Page_Load(object sender, System.EventArgs e)
{
if (!Page.IsPostBack)
{
fileName = "1";
}
}
protected void btnAddBusiness_Click(object sender, EventArgs e)
{
Response.Write(fileName); // 怎么点击按钮后 fileName 变成null 了？
}
怎么点击按钮后 fileName 变成null 了？
------解决方案--------------------------------------------------------
fileName赋一个初始值不就行了么
- C# code
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); }