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DataRowView

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  • Repeater绑定List的场景下ItemDataBound事件中e.Item.DataItem转换

    常见的三种数据源以及其e.Item.DataItem的转换方法:使用DataSet和DataTable绑定数据源时DataRowView view = (DataRowView)e.Item.DataItemRepeater)e.Item.FindControl(rptMedicine);                找到父级Repeater关联的数据项                System.Data.DataRowView rowv = (System.Data.DataRowView)e.Item.DataItem;                提取分类ID                 int PrescriptionId
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    浏览:291
  • 【C#】让DataGridView输入中实时更新数据源中的计算列

    先认识几个概念:dgv单元格:DataGridViewCelldgv行:DataGridViewRowdgv行的源行:DataRowView。而dv又是根据dt来的,所以dv背后又对应一个dt,所以DataRowView背后也对应一个DataRow,可通过DataRowView.Row获得该DataRow。简单表示就是,DataGridViewRow(访问DataBoundItem属性)→DataRowView(访问Row属性)→DataRowdgv有单元格的概念和实体类(DataGridViewCell),但dt和dv没有,后者只到行这一级,虽然可以通过DataRow或DataRowView访问单元格的值,但在类层级上并不存在DataCell这样的表示单元格的实体类,也就是dt和dv的编辑提交等操作是以只有这样,源行的计算列才会更新 (dgv.CurrentRow.DataBoundItem as DataRowView).EndEdit(); 或者执行DataRow的EndEdit()也能达到同样目的
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    浏览:1107
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  • 如何在GridView的Footer内显示总计?

    RowDataBound(object sender, GridViewRowEventArgs e){ if (e.Row.RowType == DataControlRowType.DataRow) { DataRowViewdr = e.Row.DataItem as DataRowView; num += Convert.ToInt32(dr.Row); } else if (e.Row.RowType == DataControlRowType.Footer
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    浏览:295
  • 在gridview和datagrid里设置列宽

    widestData;protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e){ System.Data.DataRowViewdrv; drv = (System.Data.DataRowView)e.Row.DataItem; if (e.Row.RowType == DataControlRowType.DataRow)
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    浏览:297
  • 在C#中怎么把子类变成参数?

    dt.Rows.Add(全部); for (int t = 0; t < cb.Items.Count; t++) { DataRow row = dt.NewRow(); row = ((System.Data.DataRowView)(cb.Items)).Row.ItemArray.ToString(); row = ((System.Data.DataRowView)(cb.Items)).Row.ItemArray.ToString
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  • 将DateTimePicker时间格式值设置为从数据库VB.NET返回的值

    我已经在我的Datagridview中尝试了以下内容 _ CellContentClick事件: Dim dr As DataRowView = GetStoreMasterBindingSource.CurrentWeekStartTimeDateTimePicker.Text“” 我还尝试了以下几种方法: Dim dr As DataRowView = GetStoreMasterBindingSource.CurrentWeekStartTimeDateTimePicker.Value
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    回答:1
  • Repeater的嵌套

    ListItemType.AlternatingItem) { Repeater rep = e.Item.FindControl(Repeater2) as Repeater;找到里层的repeater对象 DataRowViewrowv = (DataRowView)e.Item.DataItem;找到分类Repeater关联的数据项 int typeid = Convert.ToInt32(rowv); 获取填充子类的id
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    浏览:169
  • 使用DataGrid动态绑定DropDownList

                {              if (e.Item.ItemType == ListItemType.EditItem)              {                  DataRowViewdrv = (DataRowView)e.Item.DataItem;               string current = drv.ToString();               DropDownList
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    浏览:132
  • 尝试将ListBox选定项的SUM从本地DataTable中转换为Label?

    .ValueMember Label9.Text = ListBox1.ValueMember.ToString Label9.Text = CType(ListBox1.SelectedItem, DataRowViewLabel9.Text = CType(ListBox1.SelectedValue, Integer).ToString Label.Text = CType(cbbank.SelectedItem, DataRowView
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    回答:1
  • DataBinding:“System.Data.DataRowView”不包含名为“Tasklist”的属性?

    我正在用两个网格视图创建一个页面,其中一个页面上的事件负责另一个页面中的内容。(就像你有一个任务,并且您的任务有一些步骤,所以当你从任务列表中单击一个任务时,你可以看到一个与该任务相关的步骤表),但我正面临上述异常。有人能帮我解决吗? 索引.aspx ​ td, th { border-color: rgb(222, 226, 230); } &nbsp; No available tasklists! Create a new one? Name Description Prerequisites &nbsp; Tag &nbsp; No available objectives for the selected tasklist! Create a new one? Name &nbsp; window.jQuery || document.write() feather.replace() var tables = document.getElementsByTagName(table); for (var i = 0; i < tables.length; i++) { document.getElementsByTagName(table).className += table-hover; document.getElementsByTagName(table).className += thead-dark; document.getElementsByTagName(table).className += table-responsive-sm; } index.aspx.cs using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Data;using System.Data.SqlClient;using System.Configuration; public partial class index : System.Web.UI.Page{ SqlConnection connection = new SqlConnection(ConfigurationManager.AppSettings.ToString()); SqlDataAdapter adapter = new SqlDataAdapter(); SqlCommand command = new SqlCommand(); DataTable table = new DataTable(); protected void Page_Load(object sender, EventArgs e){ if (!IsPostBack) { showTasklists(); }} private void showTasklists(){ try { command.Connection = connection; command.CommandText = select * from tasklist; adapter = new SqlDataAdapter(command); adapter.Fill(table); tasklistsGridView.DataSource = table; tasklistsGridView.DataBind(); } catch (Exception x) { Response.Write(Exception: + x.Message); }} protected void tasklistsGridView_PageIndexChanging(object sender, GridViewPageEventArgs e){ tasklistsGridView.PageIndex = e.NewPageIndex; showTasklists();} protected void tasklistsGridView_RowDeleting(object sender, GridViewDeleteEventArgs e) { try { command.Connection = connection; command.CommandText = delete from tasklist where Id= + tasklistsGridView.DataKeys.Values.ToString() + ; connection.Open(); command.ExecuteNonQuery(); connection.Close(); showTasklists(); } catch (Exception x) { Response.Write(Exception: + x.Message); }} protected void tasklistsGridView_RowEditing(object sender, GridViewEditEventArgs e){ tasklistsGridView.EditIndex = e.NewEditIndex; showTasklists();} protected void tasklistsGridView_RowUpdating(object sender, GridViewUpdateEventArgs e){ try { TextBox txtName = (TextBox)tasklistsGridView.Rows.FindControl(txtName); TextBox txtDescription = (TextBox)tasklistsGridView.Rows.FindControl(txtDescription); TextBox txtPrerequisites = (TextBox)tasklistsGridView.Rows.FindControl(txtPrerequisites); DropDownList ddlWorkgroup = (DropDownList)tasklistsGridView.FooterRow.FindControl(DropDownList1); TextBox txtTag = (TextBox)tasklistsGridView.Rows.FindControl(txtTag); command.Connection = connection; command.CommandText = update tasklist set name = + txtName.Text + ,description = + txtDescription.Text + ,prerequisites = + txtPrerequisites.Text + ,workgroup = + ddlWorkgroup.SelectedItem.ToString() + ,tag = + txtTag.Text + WHERE Id= + tasklistsGridView.DataKeys.Values.ToString() + ; connection.Open(); command.ExecuteNonQuery(); tasklistsGridView.EditIndex = -1; showTasklists(); connection.Close(); } catch (Exception x) { Response.Write(Exception: + x.Message); }} protected void tasklistsGridView_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e){ tasklistsGridView.EditIndex = -1; showTasklists();} protected void tasklistsGridView_RowCommand(object sender, GridViewCommandEventArgs e){ try { if (e.CommandName.Equals(AddNew)) { TextBox txtName = (TextBox)tasklistsGridView.FooterRow.FindControl(txtName); TextBox txtDescription = (TextBox)tasklistsGridView.FooterRow.FindControl(txtDescription); TextBox txtPrerequisites = (TextBox)tasklistsGridView.FooterRow.FindControl(txtPrerequisites); DropDownList ddlWorkgroup = (DropDownList)tasklistsGridView.FooterRow.FindControl(DropDownList1); TextBox txtTag = (TextBox)tasklistsGridView.FooterRow.FindControl(txtTag); command.Connection = connection; command.CommandText = insert into tasklist(name, description,prerequisites,workgroup,tag) Values( + txtName.Text + , + txtDescription.Text + , + txtPrerequisites.Text + , + ddlWorkgroup.SelectedItem.ToString() + , + txtTag.Text + ); connection.Open(); command.ExecuteNonQuery(); showTasklists(); connection.Close(); } } catch (Exception x) { Response.Write(Exception: + x.Message); }} protected void tasklistsGridView_SelectedIndexChanged(object sender, EventArgs e){ ViewState = tasklistsGridView.SelectedRow.Cells.Text; try { 2. Open Connection connection.Open(); 3. Create and Execute Command string query = select Id, objective from objectives where tasklistId= + Convert.ToInt32(ViewState) + ;; SqlCommand command = new SqlCommand(); command.Connection = connection; command.CommandText = query; SqlDataReader reader = command.ExecuteReader(); DataTable Table = new DataTable(); Table.Load(reader); objectivesGridView.DataSource = Table; objectivesGridView.DataBind(); 4. Close connection connection.Close(); } catch (Exception x) { Response.Write(exception: + x.Message); }} private void showObjectives(){ try { command.Connection = connection; command.CommandText = select * from objectives; adapter = new SqlDataAdapter(command); adapter.Fill(table); objectivesGridView.DataSource = table; objectivesGridView.DataBind(); } catch (Exception x) { Response.Write(showObjectivesException: + x.Message); }} protected void objectivesGridView_PageIndexChanging(object sender, GridViewPageEventArgs e){ objectivesGridView.PageIndex = e.NewPageIndex; showObjectives();} protected void objectivesGridView_RowDeleting(object sender, GridViewDeleteEventArgs e) { try { command.Connection = connection; command.CommandText = delete from objectives where Id= + objectivesGridView.DataKeys.Values.ToString() + ; connection.Open(); command.ExecuteNonQuery(); connection.Close(); showObjectives(); } catch (Exception x) { Response.Write(objectivesGridView_RowDeletingException: + x.Message); }} protected void objectivesGridView_RowEditing(object sender, GridViewEditEventArgs e){ objectivesGridView.EditIndex = e.NewEditIndex; showObjectives();} protected void objectivesGridView_RowUpdating(object sender, GridViewUpdateEventArgs e){ try { TextBox txtObjective = (TextBox)objectivesGridView.Rows.FindControl(txtObjective); DropDownList ddlObjectives = (DropDownList)objectivesGridView.FooterRow.FindControl(DropDownList2); command.Connection = connection; command.CommandText = update objectives set objective = + txtObjective.Text + ,tasklistId = + ddlObjectives.SelectedItem + WHERE Id= + objectivesGridView.DataKeys.Values.ToString() + ; connection.Open(); command.ExecuteNonQuery(); objectivesGridView.EditIndex = -1; showObjectives(); connection.Close(); } catch (Exception x) { Response.Write(objectivesGridView_RowUpdatingException: + x.Message); }} protected void objectivesGridView_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e){ objectivesGridView.EditIndex = -1; showObjectives();} protected void objectivesGridView_RowCommand(object sender, GridViewCommandEventArgs e){ try { if (e.CommandName.Equals(AddNew)) { TextBox txtObjective = (TextBox)objectivesGridView.FooterRow.FindControl(txtObjective); DropDownList ddlObjective = (DropDownList)objectivesGridView.FooterRow.FindControl(DropDownList2); command.Connection = connection; command.CommandText = insert into objectives(objective,tasklistId) Values( + txtObjective.Text + , + ddlObjective.SelectedItem + ); connection.Open(); command.ExecuteNonQuery(); showObjectives(); connection.Close(); } } catch (Exception x) { Response.Write(objectivesGridView_RowCommandException: + x.Message); }}}
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    回答:1
  • 关于DataGridView_DataError事件的问题

    在 System.Data.DataRow.set_Item(DataColumn column, Object value)  在 System.Data.DataRowView.SetColumnValue
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    浏览:951
  • 如何不使用让menu控件不回发(postback)

    getDataAll(“select * from F_menu where F_PARENTMENUGUID=”+sParentID +”‘ order by F_ORDER”); foreach (DataRowView
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    浏览:301
  • Visual Studio 必备可视化插件推荐

    https:vsdatawatchers.codeplex.com,这个项目包括以下内容的可视化插件:Data visualizer:DataSet、DataTable、DataRow、DataView 、DataRowView
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    浏览:409
  • c#多选下拉框(ComboBox)

    319 320 }321 322 323 324 对象帮助类325 326 public class ObjectUtil327 {328 329 获取对象的属性值330 331 可能是DataRowView;337 338 try339 {340 if (obj is DataRow)341 {342 result = (obj as DataRow);343 }344 else if (obj is DataRowView)345 {346 result = (obj as DataRowView);347 }348 else if (obj is JObject)349 {350 result = (obj as JObject
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