GridView自定义用户控件实现增、删、改
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以下是我的用户控件代码，暂时定义为MyGridView，当然它继承于GridView。
public partial class MyGridView : GridView { public MyGridView() { ViewState["SHOWBUFFER"] = new DataTable(); ViewState["DATABUFFER"] = new DataTable(); } protected void Page_Load(object sender, EventArgs e) { } #region 属性 private string[] _LIST_REQCOLUMN; /// <summary> /// 非空列列表 /// </summary> [Description("非空列列表，注意：列名必须是DataPropertyName")] public string[] LIST_REQCOLUMN { get { return _LIST_REQCOLUMN; } set { _LIST_REQCOLUMN = value; } } private string _SORTCOLUMN = ""; /// <summary> /// 排序字段名称 /// </summary> [Description("排序字段名称，此处注册后，行移动将改变此字段值")] public string SORTCOLUMN { get { return _SORTCOLUMN; } set { _SORTCOLUMN = value; } } private bool _IS_SAVE_SORT; public bool IS_SAVE_SORT { get { return _IS_SAVE_SORT; } set { _IS_SAVE_SORT = value; } } #endregion #region 公用方法 /// <summary>获取ROWID /// 获取ROWID /// </summary> /// <returns>最新的ROWID</returns> public int GetRowid() { int ROWID = 0; if (ViewState["ROWID"] == null) { ROWID = 1; ViewState["ROWID"] = 1; } else { ROWID = (int)ViewState["ROWID"]; ROWID = ROWID + 1; ViewState["ROWID"] = ROWID; } return ROWID; } /// <summary> /// DataTable的行拷贝，参数aDR：要复制的行，返回复制完成的行 /// </summary> /// <param name="aDR">要被复制的DataTable行</param> /// <returns>已经复制好的行</returns> [Description("DataTable的行拷贝，参数aDR：要复制的行，返回复制完成的行")] protected DataRow RowCopy(DataRow aDR) { DataRow retDr = aDR.Table.NewRow(); retDr.ItemArray = aDR.ItemArray; return retDr; } /// <summary> /// DataTable的行拷贝，参数aDT：要复制的DataTable,aRowNum：要复制行的行号，返回复制完成的行 /// </summary> /// <param name="aDT">要操作的DataTable</param> /// <param name="aRowNum">要复制行的行号</param> /// <returns>返回复制完成的行</returns> [Description("DataTable的行拷贝，参数aDT：要复制的DataTable,aRowNum：要复制行的行号，返回复制完成的行")] protected DataRow RowCopy(DataTable aDT, int aRowNum) { return RowCopy(aDT.Rows[aRowNum]); } /// <summary> /// 查找指定列名的列是否存在 /// </summary> /// <param name="aColumnName">列名</param> /// <returns>如果列存在则返回列号，否则返回-1</returns> [Description("查找指定列名的列是否存在，如果列存在则返回列号，否则返回-1")] public int FindColumn(DataTable aDt, string aColumnName) { int vColIndex = -1; for (int i = 0; i < aDt.Columns.Count; i++) { if (aDt.Columns[i].ColumnName.ToUpper() == aColumnName.ToUpper()) { vColIndex = i; break; } } return vColIndex; } /// <summary> /// 获取指定列号列的名称 /// </summary> /// <param name="aColumnIndex">列号</param> /// <returns>找到列的名称，如果列号小于0或大于等于列总数则返回“”</returns> [Description("获取指定列号列的名称，如果列号小于0或大于等于列总数则返回“”")] public string FindColumn(int aColumnIndex) { string vColunnName = ""; DataTable DT = GetShowBufferData(); if (aColumnIndex < 0 || aColumnIndex >= DT.Columns.Count) { vColunnName = ""; } else { vColunnName = DT.Columns[aColumnIndex].ColumnName; } return vColunnName; } public string GetColumnHeadText(int aColumnIndex) { string vHeaderText = ""; if(!(aColumnIndex < 0 || aColumnIndex >= Columns.Count)) { vHeaderText = (Columns[aColumnIndex].HeaderText); } return vHeaderText; } #endregion #region 数据操作相关方法 /// <summary> /// 得到需要保存的（新增、修改、删除）记录列表 /// </summary> /// <returns>需要保存的记录列表</returns> [Description("得到需要保存的（新增、修改、删除）记录列表")] public virtual DataTable GetSaveRow() { string FilterStr = ""; DataTable DATABUFFER = (DataTable) ViewState["DATABUFFER"]; DataTable SHOWBUFFER = (DataTable)ViewState["SHOWBUFFER"]; DataTable saveTable = DATABUFFER.Clone(); int colnum = saveTable.Columns.Count; for (int i = 0; i < colnum; i++) { DataColumn dcol = saveTable.Columns[i]; saveTable.Columns.Add(dcol.ColumnName + "_OLD", dcol.DataType); } saveTable.Columns.Add("OPTYPE", Type.GetType("System.String")); #region 收集修改过的和新增记录 foreach (DataRow drFind in SHOWBUFFER.Rows) { FilterStr = "ROWID = " + drFind["ROWID"].ToString(); DataRow[] foundRows = DATABUFFER.Select(FilterStr); if (foundRows.Length > 0) {//收集修改记录列表 bool isEqual = true; for (int i = 0; i < SHOWBUFFER.Columns.Count; i++) { string vCol = SHOWBUFFER.Columns[i].ColumnName; //if (!drFind[vCol].ToString.Equals(foundRows[0][vCol])) if (drFind[vCol].ToString() != foundRows[0][vCol].ToString()) { isEqual = false; break; } } if (!isEqual) { DataRow drSave = saveTable.NewRow(); int colscnt = drFind.ItemArray.Length; for (int i = 0; i < colscnt; i++) { drSave[SHOWBUFFER.Columns[i].ColumnName] = drFind[SHOWBUFFER.Columns[i].ColumnName]; if (SHOWBUFFER.Columns[i].ColumnName.ToUpper() != "ROWID") { drSave[SHOWBUFFER.Columns[i].ColumnName + "_OLD"] = foundRows[0][SHOWBUFFER.Columns[i].ColumnName]; } } drSave["OPTYPE"] = "UPDATE"; saveTable.Rows.Add(drSave); } } else { DataRow drSave = saveTable.NewRow(); int colscnt = drFind.ItemArray.Length; for (int i = 0; i < colscnt; i++) { drSave[SHOWBUFFER.Columns[i].ColumnName] = drFind[SHOWBUFFER.Columns[i].ColumnName]; } drSave["OPTYPE"] = "INSERT"; saveTable.Rows.Add(drSave); } } #endregion #region 收集被删除的记录 foreach (DataRow fdr in DATABUFFER.Rows) { FilterStr = "ROWID = " + fdr["ROWID"].ToString(); DataRow[] foundRow = SHOWBUFFER.Select(FilterStr); if (foundRow.Length < 1) { DataRow drSave = saveTable.NewRow(); int colscnt = fdr.ItemArray.Length; for (int i = 0; i < colscnt; i++) { drSave[i] = fdr[i]; } drSave["OPTYPE"] = "DELETE"; saveTable.Rows.Add(drSave); } } #endregion return saveTable; } /// <summary> /// 数据查询 /// </summary> /// <param name="dt">要绑定的数据</param> [Description("数据查询，需要DataTable")] public void SetData(DataTable dt) { int colrowid = FindColumn(dt,"ROWID"); if (colrowid == -1) { dt.Columns.Add("ROWID", Type.GetType("System.Int32")); } foreach (DataRow dr in dt.Rows) { dr["ROWID"] = GetRowid(); } DataTable DATABUFFER = dt.Copy(); DataTable SHOWBUFFER = dt; DataSource = SHOWBUFFER; DataBind(); SetShowBufferData(SHOWBUFFER); SetDataBufferData(DATABUFFER); } /// <summary> /// 获取显示缓冲数据 /// </summary> /// <returns></returns> [Description("获取显示缓冲数据，返回DataTable")] public DataTable GetShowBufferData() { if (ViewState["SHOWBUFFER"] == null) ViewState["SHOWBUFFER"] = new DataTable(); return (DataTable)ViewState["SHOWBUFFER"]; } /// <summary> /// 获取原始缓冲数据 /// </summary> /// <returns></returns> [Description("获取原始缓冲数据，返回DataTable")] public DataTable GetDataBufferData() { if (ViewState["DATABUFFER"] == null) ViewState["DATABUFFER"] = new DataTable(); return (DataTable)ViewState["DATABUFFER"]; } /// <summary> /// 缓冲显示数据 /// </summary> /// <param name="aDt">要缓冲的数据</param> [Description("缓冲显示数据")] public void SetShowBufferData(DataTable aDt) { ViewState["SHOWBUFFER"] = aDt; } /// <summary> /// 缓冲原始数据 /// </summary> /// <param name="aDt">要缓冲的数据</param> [Description("缓冲原始数据")] public void SetDataBufferData(DataTable aDt) { ViewState["DATABUFFER"] = aDt; } /// <summary> /// 数据非空检查 /// </summary> /// <returns>true：通过检查，false：未通过检查</returns> [Description("数据非空检查，返回true：通过检查，false：未通过检查")] public string DataNotNullCheck() { DataTable SHOWBUFFER = (DataTable)ViewState["SHOWBUFFER"]; bool vMark = true; string vRet = ""; if (LIST_REQCOLUMN.Length > 0) { for (int vRow = 0; vRow < Rows.Count; vRow++) { for (int vCol = 0; vCol < LIST_REQCOLUMN.Length; vCol++) { if (SHOWBUFFER.Rows[vRow][LIST_REQCOLUMN[vCol]] == DBNull.Value) { vMark = false; vRet = "第" + vRow.ToString() + "行，第" + vCol.ToString() + "列不能为空！"; break; } } if (!vMark) break; } } return vRet; } /// <summary> /// 新增一行 /// </summary> /// <returns>返回GridView新增的行</returns> public GridViewRow AddRow() { DataTable showBuffer = GetShowBufferData(); DataRow newRow = showBuffer.NewRow(); int vRowId = GetRowid(); newRow["ROWID"] = vRowId; showBuffer.Rows.Add(newRow); DataSource = showBuffer; DataBind(); SetShowBufferData(showBuffer); return Rows[Rows.Count - 1]; } /// <summary> /// 删除指定行号的记录 /// </summary> /// <param name="aRowIndex">要删除行的行号</param> public void DeleteRow(List<int> aRowIndex) { if (aRowIndex.Count < 1) return; int vMark = 0; for (int i = 0; i < aRowIndex.Count; i++) { vMark = aRowIndex[i]; for (int j = i + 1; j < aRowIndex.Count; j++) { if (vMark > aRowIndex[j]) { vMark = aRowIndex[j]; } } aRowIndex[i] = vMark; } DataTable showBuffer = GetShowBufferData(); for (int i = aRowIndex.Count - 1; i >= 0; i--) { showBuffer.Rows.RemoveAt(aRowIndex[i]); } DataSource = showBuffer; DataBind(); SetShowBufferData(showBuffer); } #endregion }上面的MyGridView已经完成了封装，在页面中拖入该用户控件即可，后台中就可以调用相关的方法。下面看看在页面中怎么实现增、删、改
查询
在页面初始化时，调用封装类中的SetData方法
插入 之前
//同步展示表数据 public void SendGridViewToShowBUffer() { DataTable showbuffer = gvAccount.GetShowBufferData(); foreach (GridViewRow gvrow in gvAccount.Rows) { int RowIndex = gvrow.RowIndex; Label lblID = (Label)gvrow.FindControl("lblID"); showbuffer.Rows[RowIndex]["ID"] = lblID.Text == "" ? 0 : Convert.ToInt32(lblID.Text); DropDownList ddlItemSection = (DropDownList)gvrow.FindControl("ddlItemSection"); showbuffer.Rows[RowIndex]["SECTION"] = ddlItemSection.SelectedValue; DropDownList ddlItemSubject = (DropDownList)gvrow.FindControl("ddlItemSubject"); showbuffer.Rows[RowIndex]["SUBJECT"] = ddlItemSubject.SelectedValue == "" ? 0 : Convert.ToInt32(ddlItemSubject.SelectedValue); TextBox txtAmount = (TextBox)gvrow.FindControl("txtAmount"); showbuffer.Rows[RowIndex]["AMOUNT"] = txtAmount.Text == "" ? 0.00M : Convert.ToDecimal(txtAmount.Text); TextBox txtOccuredTime = (TextBox)gvrow.FindControl("txtOccuredTime"); showbuffer.Rows[RowIndex]["OCCURED_TIME"] = txtOccuredTime.Text.ToString(); DropDownList ddlItemCreator = (DropDownList)gvrow.FindControl("ddlItemCreator"); showbuffer.Rows[RowIndex]["CREATOR"] = ddlItemCreator.SelectedValue; TextBox txtCreatedTime = (TextBox)gvrow.FindControl("txtCreatedTime"); showbuffer.Rows[RowIndex]["CREATED_TIME"] = txtCreatedTime.Text.ToString(); DropDownList ddlCommitFlag = (DropDownList)gvrow.FindControl("ddlCommitFlag"); showbuffer.Rows[RowIndex]["COMMIT_FLAG"] = ddlCommitFlag.SelectedValue; DropDownList ddlItemProject = (DropDownList)gvrow.FindControl("ddlItemProject"); try { showbuffer.Rows[RowIndex]["PROJECT"] = Convert.ToInt32(ddlItemProject.SelectedValue); } catch { showbuffer.Rows[RowIndex]["PROJECT"] = DBNull.Value; } TextBox txtRemark = (TextBox)gvrow.FindControl("txtRemark"); showbuffer.Rows[RowIndex]["REMARK"] = txtRemark.Text; } gvAccount.SetShowBufferData(showbuffer); }这个方法很重要，无论执行增、删还是改都得调用该方法，GridViewRow中的列根据自己的需要修改。
插入
protected void btnAdd_Click(object sender, EventArgs e) { SendGridViewToShowBUffer(); GridViewRow gr = gvAccount.AddRow(); DropDownList ddlItemCreator = (DropDownList)gr.FindControl("ddlItemCreator"); ddlItemCreator.SelectedValue = GetUser(); TextBox txtCreatedTime = (TextBox)gr.FindControl("txtCreatedTime"); txtCreatedTime.Text = DateTime.Now.ToString("yyyy-MM-dd"); }删除
protected void btnDelete_Click(object sender, EventArgs e) { SendGridViewToShowBUffer(); int cnt = gvAccount.Rows.Count; List<int> vDelRowList = new List<int>(); for (int i = 0; i < cnt; i++) { GridViewRow gvr = gvAccount.Rows[i]; CheckBox cbs = (CheckBox)gvr.FindControl("ckbSelect"); if (cbs.Checked) { vDelRowList.Add(i); } } gvAccount.DeleteRow(vDelRowList); }保存
public string SaveAccount() { string vRet = string.Empty; bool vFlag = ValCell(); if (vFlag == true) { SendGridViewToShowBUffer(); DataTable saveData = gvAccount.GetSaveRow(); List<T_SECTION_INOUT> vProjectList = new List<T_SECTION_INOUT>(); for (int i = 0; i < saveData.Rows.Count; i++) { DataRow dr = saveData.Rows[i]; T_SECTION_INOUT vAccount = new T_SECTION_INOUT(); string vOpType = dr["OPTYPE"].ToString(); vAccount.OPTYPE = vOpType; switch (vOpType) { case "DELETE": { vAccount.ID = Convert.ToInt32(dr["ID"].ToString()); break; } case "INSERT": { vAccount.Section = dr["SECTION"].ToString(); vAccount.Subject = dr["SUBJECT"].ToString(); vAccount.Amount = Convert.ToDecimal(dr["AMOUNT"].ToString()); vAccount.OccuredTime = Convert.ToDateTime(dr["OCCURED_TIME"].ToString()); vAccount.Creator = dr["CREATOR"].ToString(); ; vAccount.CreatedTime = Convert.ToDateTime(dr["CREATED_TIME"].ToString()); vAccount.CommitFlag = Convert.ToChar(dr["COMMIT_FLAG"].ToString()); vAccount.Project = Convert.ToInt32(dr["PROJECT"].ToString()); vAccount.Remark = dr["REMARK"].ToString(); break; } case "UPDATE": { vAccount.ID = Convert.ToInt32(dr["ID"].ToString()); vAccount.Section = dr["SECTION"].ToString(); vAccount.Subject = dr["SUBJECT"].ToString(); vAccount.Amount = Convert.ToDecimal(dr["AMOUNT"].ToString()); vAccount.OccuredTime = Convert.ToDateTime(dr["OCCURED_TIME"].ToString()); vAccount.Creator = dr["CREATOR"].ToString(); ; vAccount.CreatedTime = Convert.ToDateTime(dr["CREATED_TIME"].ToString()); vAccount.CommitFlag = Convert.ToChar(dr["COMMIT_FLAG"].ToString()); vAccount.Project = Convert.ToInt32(dr["PROJECT"].ToString()); vAccount.Remark = dr["REMARK"].ToString(); break; } default: break; } vProjectList.Add(vAccount); } vRet = useBusiness.SaveAccount(vProjectList); return vRet; } else { return "数据验证不通过！"; } }//保存 protected void btnSave_Click(object sender, EventArgs e) { string vSaveMsg = SaveAccount(); BindAccountData(); if (string.IsNullOrEmpty(vSaveMsg)) { Response.Write("<script>alert('保存成功！');</script>"); } }保存调用的业务逻辑代码
public string SaveAccount(List<T_SECTION_INOUT> objList) { string ret = ""; string sql = ""; List<DbParameter> iParms = new List<DbParameter>(); for (int i = 0; i < objList.Count; i++) { switch (objList[i].OPTYPE.ToUpper()) { case "INSERT": { sql += @" insert into T_SECTION_INOUT (SECTION, SUBJECT, AMOUNT, OCCURED_TIME, CREATOR, CREATED_TIME, COMMIT_FLAG, PROJECT, REMARK) values (@SECTION" + i.ToString() + ",@SUBJECT" + i.ToString() + ",@AMOUNT" + i.ToString() + ","; sql += " @OCCURED_TIME" + i.ToString() + ",@CREATOR" + i.ToString() + ",@CREATED_TIME" + i.ToString() + ",@COMMIT_FLAG" + i.ToString() + ",@PROJECT" + i.ToString() + ","; sql += " @REMARK" + i.ToString() + ");"; iParms.Add(new SqlParameter("@SECTION" + i.ToString(), objList[i].Section)); iParms.Add(new SqlParameter("@SUBJECT" + i.ToString(), objList[i].Subject)); iParms.Add(new SqlParameter("@AMOUNT" + i.ToString(), objList[i].Amount)); iParms.Add(new SqlParameter("@OCCURED_TIME" + i.ToString(), objList[i].OccuredTime)); iParms.Add(new SqlParameter("@CREATOR" + i.ToString(), objList[i].Creator)); iParms.Add(new SqlParameter("@CREATED_TIME" + i.ToString(), objList[i].CreatedTime)); iParms.Add(new SqlParameter("@COMMIT_FLAG" + i.ToString(), objList[i].CommitFlag)); iParms.Add(new SqlParameter("@PROJECT" + i.ToString(), objList[i].Project)); iParms.Add(new SqlParameter("@REMARK" + i.ToString(), objList[i].Remark)); break; } case "UPDATE": { sql += @" update T_SECTION_INOUT set SECTION = @SECTION" + i.ToString() + ", SUBJECT = @SUBJECT" + i.ToString(); sql += " ,AMOUNT = @AMOUNT" + i.ToString() + ", OCCURED_TIME = @OCCURED_TIME" + i.ToString() + ", CREATOR = @CREATOR" + i.ToString() + ", CREATED_TIME = @CREATED_TIME" + i.ToString(); sql += " ,COMMIT_FLAG = @COMMIT_FLAG" + i.ToString(); sql += " ,PROJECT = @PROJECT" + i.ToString(); sql += " ,REMARK = @REMARK" + i.ToString(); sql += " where ID = @ID" + i.ToString() + ";"; iParms.Add(new SqlParameter("@ID" + i.ToString(), objList[i].ID)); iParms.Add(new SqlParameter("@SECTION" + i.ToString(), objList[i].Section)); iParms.Add(new SqlParameter("@SUBJECT" + i.ToString(), objList[i].Subject)); iParms.Add(new SqlParameter("@AMOUNT" + i.ToString(), objList[i].Amount)); iParms.Add(new SqlParameter("@OCCURED_TIME" + i.ToString(), objList[i].OccuredTime)); iParms.Add(new SqlParameter("@CREATOR" + i.ToString(), objList[i].Creator)); iParms.Add(new SqlParameter("@CREATED_TIME" + i.ToString(), objList[i].CreatedTime)); iParms.Add(new SqlParameter("@COMMIT_FLAG" + i.ToString(), objList[i].CommitFlag)); iParms.Add(new SqlParameter("@PROJECT" + i.ToString(), objList[i].Project)); iParms.Add(new SqlParameter("@REMARK" + i.ToString(), objList[i].Remark)); break; } case "DELETE": { sql += @"delete T_SECTION_INOUT where ID = @ID" + i.ToString() + ";"; iParms.Add(new SqlParameter("@ID" + i.ToString(), objList[i].ID)); break; } default: break; } } try { Excute(sql, iParms); } catch (Exception ex) { ret = ex.Message; } return ret; }整体上就是这么多，如果想熟练使用该控件，还需要把MyGridView类库中的方法给搞清楚。写这篇文章的主要目的还是想分享这个类库，后面的增、删、改只是针对自己项目进行的简单运用，欢迎各位交流，时间不早了，哎呀、今天终于睡迟了一回，各位晚安！
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