C# 当前上下文中不存在名称“Console”
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class Program
class C
public int Value = 0;
static void Main(string[] args)
int v1=0;
int v2=v1;
v2 = 927;
C r1=new C();
C r2=r1 ;
r2.Value =112;
Console.WriteLine("Values:0,1",v1 ,v2 );
Console.WriteLine("Refs:0,1",r1 .Value ,r2 .Value);
Console.ReadLine();
初学C# 求大神
错误：名称在当前上下文中不存在（Webpart、C#、Visual Studios、SharePoint 2010）
【中文标题】错误：名称在当前上下文中不存在（Webpart、C#、Visual Studios、SharePoint 2010）【英文标题】：Error: The name does not exist in the current context (Webpart, C#, Visual Studios, SharePoint 2010) 【发布时间】：2013-09-28 11:34:33 【问题描述】：我正在尝试向以前只读的页面添加控件。环境是：
SharePoint 2010 解决方案 在 Visual Studios 2010 中开发 此功能位于 Web 部件 (AceAllocation30.cs) 上 代码是C#这是我添加的代码：
sb.Append(" <td width=\"75%\">"); lc3 = new LiteralControl(sb.ToString()); Controls.Add(lc3); TextBox JDHFTxt = new TextBox(); JDHFTxt.ID = "txtJDHF"; JDHFTxt.Enabled = true; JDHFTxt.Value = ConvertToAllocation(DrACE["SPRAmount"].ToString()); Controls.Add(JDHFTxt); sb = new StringBuilder();
sb.Append("</td>");
上面添加的代码替换了这段代码：
sb.Append(" <td class=\"rowText\" width=\"75%\">" + ConvertToAllocation(DrACE["SPRAmount"].ToString()) + "</td>");
要获得更完整的参考，以上内容的完整原始部分如下：
sb.Append(" <tr class=\"row2\">");
sb.Append(" <td class=\"rowTextLeft\" width=\"25%\">SPR/JDHF Allotment:</td>");
sb.Append(" <td class=\"rowText\" width=\"75%\">" + ConvertToAllocation(DrACE["SPRAmount"].ToString()) + "</td>");
sb.Append(" </tr>");
但是当我部署时出现以下错误：
错误 35； 'System.Web.UI.WebControls.TextBox' 不包含 'Value' 的定义并且没有扩展方法 'Value' 接受 'System.Web.UI.WebControls.TextBox' 类型的第一个参数可以是 找到（您是否缺少 using 指令或程序集引用？）
错误 32；当前上下文中不存在名称“lc3”
错误 33；当前上下文中不存在名称“lc3”
这是完整的页面代码：
using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
//Data Controls
using System.Runtime.InteropServices;
using System.Data;
using System.Collections.Specialized;
using System.Data.SqlClient;
using IDE_Utility.DBConnection;
using IDE_Utility.ErrorLogging;
using System.Text;
namespace GIK30.ACEAllocation30
[ToolboxItemAttribute(false)]
public class ACEAllocation30 : WebPart
private bool _error = false;
private string _myProperty = null;
private Label m_lblMsg;
private Button m_NewAllocation_Button;
private HttpResponse Response = HttpContext.Current.Response;
[Personalizable(PersonalizationScope.Shared)]
[WebBrowsable(true)]
[System.ComponentModel.Category("My Property Group")]
[WebDisplayName("MyProperty")]
[WebDescription("Meaningless Property")]
public string MyProperty
get
if (_myProperty == null)
_myProperty = "";
return _myProperty;
set
_myProperty = value;
public ACEAllocation30()
this.ExportMode = WebPartExportMode.All;
/// <summary>
/// Create all your controls here for rendering.
/// Try to avoid using the RenderWebPart() method.
/// </summary>
protected override void CreateChildControls()
if (!_error)
SPSite site = SPContext.Current.Site;
DataSet DsAllocation = new DataSet();
DataView DvAllocation = null;
DataSet DsACE = new DataSet();
DataRow DrACE;
int ACEID = 0;
if (site != null)
using (SPWeb web = site.OpenWeb())
try
int.TryParse(Page.Request["ACEID"], out ACEID);
int UserID = GIK20_CodeLibrary.GetUserID(SPContext.Current.Web);
StringCollection Access = GIK20_CodeLibrary.GetUserAccessForACE(UserID, ACEID);
bool IsACEAdmin = GIK20_CodeLibrary.IsUserACEAdmin(Access);
bool IsContracts = GIK20_CodeLibrary.IsUserAllocationSpecialist(Access);
// Make sure the ACE exists first
Boolean IsACE = false;
SqlParameter sqlParamACEID = new SqlParameter();
sqlParamACEID.ParameterName = "@aceid";
sqlParamACEID.DbType = DbType.Int32;
sqlParamACEID.Value = ACEID;
SqlParameter[] sqlParams = new SqlParameter[]
sqlParamACEID
;
try
DsACE = DBConnection.GetDataSet("getAceInfo", CommandType.StoredProcedure, sqlParams);
catch (Exception ex)
HandleException(ex);
IDEErrLogging.LogError(new IDEException("ACE Allocation: Validate ACE: Error on Stored Procedure: getAceInfo", ex), true, false, SPContext.Current.Web);
if (DsACE != null)
if (DsACE.Tables[0].Rows.Count == 1)
IsACE = true;
if (IsACE)
base.CreateChildControls();
DrACE = DsACE.Tables[0].Rows[0];
//strSQL = "select * from ACE_Allocation where ACEID = " + ACEID.ToString();
try
sqlParamACEID = new SqlParameter();
sqlParamACEID.ParameterName = "@aceid";
sqlParamACEID.DbType = DbType.Int32;
sqlParamACEID.Value = ACEID;
sqlParams = new SqlParameter[]
sqlParamACEID
;
DsAllocation = DBConnection.GetDataSet("getACeAllocation", CommandType.StoredProcedure, sqlParams);
DvAllocation = DsAllocation.Tables[0].DefaultView;
DvAllocation.Sort = "FY, AllocationType";
catch (Exception ex)
HandleException(ex);
IDEErrLogging.LogError(new IDEException("ACE Allocation: Error on ACE Allocation Stored Procedure: getACeAllocation", ex), true, false, SPContext.Current.Web);
// Check to see if edit controls are enabled
Boolean enableStatus = false;
if (IsACEAdmin || IsContracts)
enableStatus = true;
//enableStatus = GIK20_CodeLibrary.CheckUserInGroup(myWeb, statusArray);
string AllocationAvail = "No";
if (DrACE["AllocationAVailable"].Equals(true))
AllocationAvail = "Yes";
StringBuilder sb = new StringBuilder();
sb.Append("<div class=\"border\" style=\"width:700px\">");
sb.Append(" <div class=\"partTitle\" >");
sb.Append(" <table cellspacing=\"0\" cellpadding=\"0\" height=\"25px\" width=\"100%\">");
sb.Append(" <tr>");
sb.Append(" <td class=\"partTitleText\">ACE ALLOCATION</td>");
sb.Append(" </tr>");
sb.Append(" </table>");
sb.Append(" </div>");
sb.Append(" <div class=\"columnHeader\">");
sb.Append(" <table cellspacing=\"0\" cellpadding=\"0\" height=\"25px\" width=\"100%\">");
sb.Append(" <tr>");
sb.Append(" <td class=\"columnHeaderText\" style=\"margin-top:5px;\">Allocation Information</td>");
sb.Append(" </tr>");
sb.Append(" </table>");
sb.Append(" </div>");
sb.Append(" <div class=\"rows\">");
sb.Append(" <table cellspacing=\"0\" cellpadding=\"0\" width=\"100%\">");
sb.Append(" <tr class=\"row1\">");
sb.Append(" <td class=\"rowTextLeft\" width=\"25%\">Allocation Available:</td>");
sb.Append(" <td class=\"rowText\" width=\"75%\">" + AllocationAvail + "</td>");
sb.Append(" </tr>");
sb.Append(" <tr class=\"row2\">");
sb.Append(" <td class=\"rowTextLeft\" width=\"25%\">SPR/JDHF Allotment:</td>");
sb.Append(" <td class=\"rowText\" width=\"75%\">" + ConvertToAllocation(DrACE["SPRAmount"].ToString()) + "</td>");
sb.Append(" </tr>");
sb.Append(" <tr class=\"row1\">");
sb.Append(" <td class=\"rowTextLeft\" width=\"25%\">SPR Source:</td>");
sb.Append(" <td class=\"rowText\" width=\"75%\">" + DrACE["SPRSource"] + "</td>");
sb.Append(" </tr>");
//sb.Append(" <tr class=\"row2\">");
//sb.Append(" <td class=\"rowTextLeft\" width=\"25%\">TEV:</td>");
//sb.Append(" <td class=\"rowText\" width=\"75%\">" + ConvertToAllocation(DrACE["EstVal"].ToString()) + "</td>"); //); + DrACE["SPRSource"] + "</td>");
//sb.Append(" </tr>");
sb.Append(" <tr class=\"row2\">");
sb.Append(" <td class=\"rowTextLeft\" width=\"25%\">Allocation Comments:</td>");
sb.Append(" <td class=\"rowText\" width=\"75%\">" + DrACE["AllocationComments"] + "</td>");
sb.Append(" </tr>");
sb.Append(" </table>");
sb.Append(" </div>");
sb.Append(" <div class=\"columnHeader\">");
sb.Append(" <table cellspacing=\"0\" cellpadding=\"0\" height=\"25px\" width=\"100%\">");
sb.Append(" <tr>");
sb.Append(" <td class=\"rowTextTitle\" width=\"21%\">Type</td>");
sb.Append(" <td class=\"rowTextTitle\" width=\"20%\">Source</td>");
sb.Append(" <td class=\"rowTextTitle\" width=\"20%\">FY</td>");
sb.Append(" <td class=\"rowTextTitle\" width=\"20%\">$ Amount</td>");
sb.Append(" <td width=\"19%\"></td>");
sb.Append(" </tr>");
sb.Append(" </table>");
sb.Append(" </div>");
sb.Append(" <div class=\"rows\">");
sb.Append(" <table cellspacing=\"0\" cellpadding=\"0\" width=\"100%\">");
if (DvAllocation != null)
Boolean row1 = true;
int i = 1;
LiteralControl lc2 = new LiteralControl();
foreach (DataRowView DvAllocationRow in DvAllocation)
if (row1)
sb.Append(" <tr class=\"row1\">");
row1 = false;
else
sb.Append(" <tr class=\"row2\">");
row1 = true;
sb.Append(" <td class=\"rowText\" width=\"21%\">" + DvAllocationRow["AllocationType"].ToString() + "</td>");
sb.Append(" <td class=\"rowText\" width=\"20%\">" + DvAllocationRow["AllocationSourceName"].ToString() + "</td>");
sb.Append(" <td class=\"rowText\" width=\"20%\">" + DvAllocationRow["FYTxt"].ToString() + "</td>");
sb.Append(" <td class=\"rowText\" width=\"20%\">" + ConvertToAllocation(DvAllocationRow["Amount"].ToString()) + "</td>");
string querystring = "?ACEID=" + DvAllocationRow["ACEID"].ToString() + "&ACEAllocationID=" + DvAllocationRow["ACE_AllocationID"].ToString();
if (enableStatus)
m_NewAllocation_Button = new Button();
m_NewAllocation_Button.Text = "Edit Allocation";
//m_NewAllocation_Button.Style = "font-size:8pt;font-family:Verdana,sans-serif";
//m_NewAllocation_Button.Width = 80;
//m_NewAllocation_Button.Height = 21;
m_NewAllocation_Button.CssClass = "plainButton";
m_NewAllocation_Button.ID = "NewAllocationButton" + i;
m_NewAllocation_Button.Attributes.Add("OnClick", "window.open('../_layouts/GIK30/EditAllocation.aspx" + querystring + "');");
//string[] statusArray = new string[] "Owner", "SiteAdmin" ;
m_NewAllocation_Button.Enabled = enableStatus;
//m_NewAllocation_Button.Visible = enableStatus;
sb.Append(" <td width=\"19%\" align=\"right\" style=\"padding-right:20px\">");
lc2 = new LiteralControl(sb.ToString());
Controls.Add(lc2);
Controls.Add(m_NewAllocation_Button);
sb = new StringBuilder();
sb.Append("</td>");
else
sb.Append(" <td width=\"19%\"></td>");
//sb.Append(" <td width=\"19%\"><input TYPE=\"button\" VALUE=\"Edit Allocation\" style=\"font-size:8pt;font-family:Verdana,sans-serif\" />");
sb.Append(" </td>");
sb.Append(" </tr>");
i++;
else
sb.Append(" <tr class=\"row1\"><td class=\"rowText\" width=\"100%\">Error Reading from Database</td></tr>");
sb.Append(" </table>");
sb.Append(" </div>");
sb.Append(" <table cellspacing=\"0\" cellpadding=\"0\" style=\"margin-left:9px; margin-top:1px; margin-right:9px\">");
sb.Append(" <tr class=\"total\">");
sb.Append(" <td width=\"555px\" style=\"vertical-align:middle\">EV on Allotment: " + ConvertToAllocation(DrACE["EstVa"].ToString()) + "</td>");
sb.Append(" <td align=\"right\" style=\"padding-right:5px\">");
LiteralControl lc = new LiteralControl(sb.ToString());
Controls.Add(lc);
m_NewAllocation_Button = new Button();
m_NewAllocation_Button.Text = "Add New Allocation";
//m_NewAllocation_Button.Style = "font-size:8pt;font-family:Verdana,sans-serif";
//m_NewAllocation_Button.Width = 80;
//m_NewAllocation_Button.Height = 21;
m_NewAllocation_Button.CssClass = "plainButton";
m_NewAllocation_Button.ID = "NewAllocationButton";
m_NewAllocation_Button.Attributes.Add("OnClick", "window.open('../_layouts/GIK30/EditAllocation.aspx?ACEID=" + ACEID + "');");
//string[] statusArray = new string[] "Owner", "SiteAdmin" ;
m_NewAllocation_Button.Enabled = enableStatus;
//m_NewAllocation_Button.Visible = enableStatus;
Controls.Add(m_NewAllocation_Button);
sb = new StringBuilder();
sb.Append("</td>");
sb.Append(" </tr>");
sb.Append(" </table>");
sb.Append("</div>");
lc = new LiteralControl(sb.ToString());
Controls.Add(lc);
catch (Exception ex)
HandleException(ex);
IDEErrLogging.LogError(new IDEException("ACE Allocation: Error on ACE: " + ACEID.ToString(), ex), true, false, SPContext.Current.Web);
/// <summary>
/// Ensures that the CreateChildControls() is called before events.
/// Use CreateChildControls() to create your controls.
/// </summary>
/// <param name="e"></param>
protected override void OnLoad(EventArgs e)
if (!_error)
try
base.OnLoad(e);
this.EnsureChildControls();
// Your code here...
catch (Exception ex)
HandleException(ex);
/// <summary>
/// Clear all child controls and add an error message for display.
/// </summary>
/// <param name="ex"></param>
private void HandleException(Exception ex)
this._error = true;
this.Controls.Clear();
this.Controls.Add(new LiteralControl(ex.Message));
protected void m_NewAllocation_Button_Click(object sender, EventArgs e)
Page.Response.Redirect("EditAllocation.aspx?ACEID=" + Page.Request["ACEID"]);
private string ConvertToAllocation(string stramount)
// Convert the real number to a $ format
double amount = 0.0;
if (!String.IsNullOrEmpty(stramount))
amount = Convert.ToDouble(stramount);
return string.Format("0:C", amount);
这是页面外观的模型：
【问题讨论】：
【参考方案1】：问题是我在使用它之前没有添加我的文字控制。我在使用字段和控件构建表格之前添加了它：
LiteralControl lc3 = new LiteralControl();
【讨论】：
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