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问题描述
我正在创建自定义服务器控件.
我在页面中使用此控件在其中创建了一个文本框.
但是当页面回发(回发)时,文本框的值将被忽略.
我想到了在这里使用viewstate,但是想得到文本框值.
可能我使用了错误的方式来帮助我.
以下是我的代码.
I am creating custom server controls.
I created a textbox in this used this control in my page.
But when page is posted back(postback) the value of textbox gets omitted.
I thought of using viewstate here but m nt getting textbox value.
May be m using in wrong way help me please.
Below is my code.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Reflection;
namespace DNWebComponent {
[DefaultProperty("Text")]
[ToolboxData("<{0}:DNTextBox runat=server></{0}:DNTextBox>")]
public class DNTextBox : WebControl, IDNComponent {
public String _ConnectedField;
private string _label;
private TextBox _txtBox;
private string _connectedField;
private string _MultiSeekField;
private string _InputTable;
public string ControlClientID;
public DNTextBox() {
_txtBox = new TextBox();
}
[PersistToViewState]
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
public string Text {
get {
String s = (String)ViewState["Text"];
return ((s == null) ? "[" + AspTextBox.Text + "]" : s);
}
set {
ViewState["Text"] = value;
}
}
public DNTextBox(string label)
: this() {
this._label = label;
}
public String Label {
get { return _label; }
set { _label = value; }
}
public String ConnectedField {
get { return _connectedField; }
set { _connectedField = value; }
}
public String MultiSeekField {
get { return _MultiSeekField; }
set { _MultiSeekField = value; }
}
public String InputTable {
get { return _InputTable; }
set { _InputTable = value; }
}
public TextBox AspTextBox {
get { return _txtBox; }
set { _txtBox = value; }
}
public string DivCss { get; set; }
protected override void RenderContents(HtmlTextWriter output) {
output.Write("<div class=\"" + DivCss + "\" >");
output.Write(Text);
output.Write(_label + ": ");
_txtBox.RenderControl(output);
output.Write("</div>");
}
public bool FillControl() {
return false;
}
protected override void LoadViewState(object savedState) {
base.LoadViewState(savedState);
PropertyInfo[] properties = GetType().GetProperties();
foreach (PropertyInfo property in properties) {
object[] attributes = property.GetCustomAttributes(typeof(PersistToViewState), true);
if (attributes.Length > 0) {
if (ViewState[property.Name] != null)
property.SetValue(this, ViewState[property.Name], null);
}
}
}
protected override object SaveViewState() {
ViewState["Text"] = AspTextBox.Text;
//PropertyInfo[] properties = GetType().GetProperties();
//foreach (PropertyInfo property in properties) {
// object[] attributes = property.GetCustomAttributes(typeof(PersistToViewState), true);
// if (attributes.Length > 0)
// ViewState[property.Name] = property.GetValue(this, null);
//}
return base.SaveViewState();
}
[AttributeUsage(AttributeTargets.Property)]
public class PersistToViewState : Attribute {
}
}
}
推荐答案
public DNTextBox()
{
_txtBox = new TextBox();
this.Controls.Add(_txtBox);
}
希望这会有所帮助.
Hope this helps.
这篇关于如何解决自定义服务器控件中的回发?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!