c# – 更新背景工作者winforms中的标签文本

我正在使用BackGroundWorker类在sqlserver中插入一些值.我有这个循环来插入值.我正在使用以下代码

public void bw_Convert_DoWork(object sender,DoWorkEventArgs e)
    {           
        e.Result = e.Argument;
        for (int i = 0; i <  fTable.Rows.Count; i++)
        {
            try
            {
                sqlCommand cmd = new sqlCommand("INSERT INTO TBL_CDR_ANALYZER (LNG_UPLOAD_ID,DAT_START,LNG_DURATION,INT_DIRECTION,INT_CALL_DATA_TYPE,\n" +
                    "TXT_TARGET_NUMBER,TXT_OTHER_PARTY_NUMBER,TXT_TARGET_imsI,TXT_TARGET_IMEI,TXT_TARGET_CELL_ID,TXT_ROAMING_NETWORK_COMPANY_NAME) VALUES \n" +
                    "(@UPLOAD_ID,@START_DATE,@DURATION,@DIRECTION,@CALL_TYPE,@TARGET_NUMBER,@OTHER_PARTY_NUMBER,@imsI,@IMEI,@CELL_ID,@ROAMING_NAME)",sqlCon);
                cmd.Parameters.Add("@UPLOAD_ID",sqlDbType.Int).Value = 1;
                cmd.Parameters.Add("@START_DATE",sqlDbType.DateTime).Value = fTable.Rows[i]["CallDate"];
                cmd.Parameters.Add("@DURATION",sqlDbType.Int).Value = fTable.Rows[i]["CallDuration"];
                cmd.Parameters.Add("@DIRECTION",sqlDbType.Int).Value = GetCallDirection(fTable.Rows[i]["CallDirection"].ToString());
                cmd.Parameters.Add("@CALL_TYPE",sqlDbType.Int).Value = GetCallType(fTable.Rows[i]["CallType"].ToString());
                cmd.Parameters.Add("@TARGET_NUMBER",sqlDbType.VarChar,25).Value = fTable.Rows[i]["TargetNo"];
                cmd.Parameters.Add("@OTHER_PARTY_NUMBER",25).Value = fTable.Rows[i]["OtherPartyNo"];
                cmd.Parameters.Add("@imsI",50).Value = fTable.Rows[i]["imsI"];
                cmd.Parameters.Add("@IMEI",50).Value = fTable.Rows[i]["IMEI"];
                cmd.Parameters.Add("@CELL_ID",50).Value = fTable.Rows[i]["CellID"];
                cmd.Parameters.Add("@ROAMING_NAME",sqlDbType.NVarChar,255).Value = fTable.Rows[i]["RoamingCompany"];
                sqlCon.open();
                cmd.ExecuteNonQuery();
                sqlCon.Close();
            }
            catch (sqlException ex)
            {

            }
            finally
            {
                sqlCon.Close();
            }
            bw_Convert.ReportProgress((100 * i) / fTable.Rows.Count);  
            **Label1.Text = i.ToString() + "Files Converted";** // getting error Here.                  
        }    
    }

如何在这里更新Label1文本？

解决方法

这应该可以从后台线程更改GUI.

Label1.Invoke((MethodInvoker)delegate {
   Label1.Text = i.ToString() + "Files Converted";});

原文地址：https://www.jb51.cc/csharp/93379.html