Questions on UI for WinForms Forum

3 answers

411 views

Hi,

Description:

I'm facing refreshing issue when using rad grid view (below I've attached code snippet you can use to reproduce it).

Generally in the described example I have two collections in parent - child relation binded to grid view and one button that adds new object to child collection.

Problem:

When first node in grid is expanded and have no children and I add a new child, it won't appear in grid view, even that node is marked as expanded (untitled.png). To see it I have to collapse and expand it again (untitled2.png) .

It's very imported for me to make it working correctly.

Code:

001.using System;

002.using System.Collections.Generic;

003.using System.ComponentModel;

004.using System.Data;

005.using System.Drawing;

006.using System.Linq;

007.using System.Text;

008.using System.Windows.Forms;

009.using Telerik.WinControls.UI;

010.

011.namespace WindowsFormsApplication1

012.{

013. public partial class Form1 : Form

014. {

015.

016. public class A

017. {

018. public int Id

019. { get; set; }

020.

021. public string Name

022. { get; set; }

023.

024. public string Value

025. { get; set; }

026. }

027.

028. public class B

029. {

030. public int ParentId

031. { get; set; }

032.

033. public string Value

034. { get; set; }

035. }

036.

037.

038. BindingList<A> parentList;

039.

040. BindingList<B> childList;

041.

042. GridViewTemplate childTemplate;

043.

044. public Form1()

045. {

046. InitializeComponent();

047.

048. radGridView1.ReadOnly = true;

049.

050. parentList = new BindingList<A>(new List<A>(new A[] {

051. new A() { Id = 1, Name = "name 1", Value = "value 1" },

052. new A() { Id = 2, Name = "name 2", Value = "value 2" },

053. }));

054.

055. childList = new BindingList<B>(new List<B>(new B[] {

056. //new B() { ParentId = 1 , Value = "b value 1"},

057. //new B() { ParentId = 1 , Value = "b value 2"},

058. new B() { ParentId = 2 , Value = "b value 3"},

059. new B() { ParentId = 2 , Value = "b value 4"}

060. }));

061.

062.

063. childTemplate = AddMonitorPackageItemsTemplate();

064. CreateRelation(childTemplate);

065. radGridView1.DataSource = bindingSource1;

066.

067. bindingSource1.DataSource = parentList;

068. bindingSource2.DataSource = childList;

069.

070. }

071.

072. void CreateRelation(GridViewTemplate childTemplate)

073. {

074. GridViewRelation monitoredItemToCSRelation = new GridViewRelation(radGridView1.MasterTemplate);

075. monitoredItemToCSRelation.ChildTemplate = childTemplate;

076. monitoredItemToCSRelation.RelationName = "childTemplateRelation";

077.

078. monitoredItemToCSRelation.ParentColumnNames.Add("Id");

079. monitoredItemToCSRelation.ChildColumnNames.Add("ParentId");

080. radGridView1.Relations.Add(monitoredItemToCSRelation);

081. }

082.

083. GridViewTemplate AddMonitorPackageItemsTemplate()

084. {

085. GridViewTemplate monitoredPackageItemTemplate = new GridViewTemplate();

086. monitoredPackageItemTemplate.DataSource = bindingSource2;

087. radGridView1.Templates.Add(monitoredPackageItemTemplate);

088. return monitoredPackageItemTemplate;

089. }

090.

091. private void button1_Click(object sender, EventArgs e)

092. {

093. childList.Add(new B() { ParentId = 1, Value = Guid.NewGuid().ToString() });

094. }

095.

096.

097. /// <summary>

098. /// Required designer variable.

099. /// </summary>

100. private System.ComponentModel.IContainer components = null;

101.

102. /// <summary>

103. /// Clean up any resources being used.

104. /// </summary>

105. /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

106. protected override void Dispose(bool disposing)

107. {

108. if (disposing && (components != null))

109. {

110. components.Dispose();

111. }

112. base.Dispose(disposing);

113. }

114.

115. #region Windows Form Designer generated code

116.

117. /// <summary>

118. /// Required method for Designer support - do not modify

119. /// the contents of this method with the code editor.

120. /// </summary>

121. private void InitializeComponent()

122. {

123. this.components = new System.ComponentModel.Container();

124. this.bindingSource1 = new System.Windows.Forms.BindingSource(this.components);

125. this.bindingSource2 = new System.Windows.Forms.BindingSource(this.components);

126. this.radGridView1 = new Telerik.WinControls.UI.RadGridView();

127. this.button1 = new System.Windows.Forms.Button();

128. ((System.ComponentModel.ISupportInitialize)(this.bindingSource1)).BeginInit();

129. ((System.ComponentModel.ISupportInitialize)(this.bindingSource2)).BeginInit();

130. ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).BeginInit();

131. this.radGridView1.SuspendLayout();

132. this.SuspendLayout();

133. //

134. // radGridView1

135. //

136. this.radGridView1.Controls.Add(this.button1);

137. this.radGridView1.Dock = System.Windows.Forms.DockStyle.Fill;

138. this.radGridView1.Location = new System.Drawing.Point(0, 0);

139. this.radGridView1.Name = "radGridView1";

140. this.radGridView1.Padding = new System.Windows.Forms.Padding(0, 0, 0, 1);

141. //

142. //

143. //

144. this.radGridView1.RootElement.Padding = new System.Windows.Forms.Padding(0, 0, 0, 1);

145. this.radGridView1.Size = new System.Drawing.Size(649, 328);

146. this.radGridView1.TabIndex = 0;

147. this.radGridView1.Text = "radGridView1";

148. //

149. // button1

150. //

151. this.button1.Location = new System.Drawing.Point(562, 3);

152. this.button1.Name = "button1";

153. this.button1.Size = new System.Drawing.Size(75, 23);

154. this.button1.TabIndex = 0;

155. this.button1.Text = "button1";

156. this.button1.UseVisualStyleBackColor = true;

157. this.button1.Click += new System.EventHandler(this.button1_Click);

158. //

159. // Form1

160. //

161. this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);

162. this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

163. this.ClientSize = new System.Drawing.Size(649, 328);

164. this.Controls.Add(this.radGridView1);

165. this.Name = "Form1";

166. this.Text = "Form1";

167. ((System.ComponentModel.ISupportInitialize)(this.bindingSource1)).EndInit();

168. ((System.ComponentModel.ISupportInitialize)(this.bindingSource2)).EndInit();

169. ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).EndInit();

170. this.radGridView1.ResumeLayout(false);

171. this.ResumeLayout(false);

172.

173. }

174.

175. #endregion

176.

177. private System.Windows.Forms.BindingSource bindingSource1;

178. private System.Windows.Forms.BindingSource bindingSource2;

179. private Telerik.WinControls.UI.RadGridView radGridView1;

180. private System.Windows.Forms.Button button1;

181. }

182.}

Regards.

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Please see link to image below.

http://i54.tinypic.com/nytsh1.png

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Good afternoon

i use the tools export

ExportToExcelML

exporter = new ExportToExcelML(rgvGrid);

exporter.SummariesExportOption =

SummariesOption.ExportAll;

exporter.RunExport(sFilepath);

and its works correctly but i need export only several columns of the gridView.. i have been looking how i could do that..
i need to export only two columns.. not all..

thanks for your help...
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Hello, this is my first post here at Telerik, I tried to find here some solution but without success.

I have a Value Object (VO) which I assign to the gridView DataSource, all the data is showed by the gridView! The problem starts when inside the VO I assign a dateTime as MinValue the gridView shows "01/01/0001", now my question is which is the best approach to show " " instead of "01/01/0001" ?

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Weird behavior during multiselection.

Hi

2010 Q2 SP2

I have grid with 500 rows and enabled multiselection.

I select first row and start multiselection (SHIFT and arrow down buttons). During selecting rows between 1 and 7 or 8 everything is fine (rows are selected – notification by orange background).

When I cross row 7 or 8 my one CPU core jumps to 50% and there is no notification that next rows are selected.

I have to stop multiselection to see orange background for selected rows.

I tested this for bound and unbound mode.

Is there any way to improve performance of this simple functionality?

I am more interested about unbound mode because in ma case I have variable number of columns.

Here you can read my simple source code:

public class MySample

{

public string Property1 { get; set; }

public string Property2 { get; set; }

public string Property3 { get; set; }

public string Property4 { get; set; }

public string Property5 { get; set; }

public string Property6 { get; set; }

public string Property7 { get; set; }

public string Property8 { get; set; }

public string Property9 { get; set; }

public string Property10 { get; set; }

}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using Telerik.WinControls.UI;

namespace PerformanceIssue

{

public partial class Form1 : Form

{

List<MySample> _list;

public Form1()

{

InitializeComponent();

_list = this.GenerateList();

}

private void btnPopulateBound_Click(object sender, EventArgs e)

{

radGridViewBound.DataSource = _list;

foreach (GridViewDataColumn col in radGridViewBound.Columns)

{ col.Width = 100; }

radGridViewBound.MultiSelect = true;

radGridViewBound.Columns[0].IsPinned = true;

}

private void btnPopulateUnbound_Click(object sender, EventArgs e)

{

GridViewTextBoxColumn col = null;

GridViewRowInfo row = null;

for (int index = 1; index <= 10; index++)

{

col = new GridViewTextBoxColumn();

radGridViewUnbound.Columns.Add(col);

col.Width = 100;

}

foreach (MySample item in _list)

{

row = radGridViewUnbound.Rows.AddNew();

row.Cells[0].Value = item.Property1;

row.Cells[1].Value = item.Property2;

row.Cells[2].Value = item.Property3;

row.Cells[3].Value = item.Property4;

row.Cells[4].Value = item.Property5;

row.Cells[5].Value = item.Property6;

row.Cells[6].Value = item.Property7;

row.Cells[7].Value = item.Property8;

row.Cells[8].Value = item.Property9;

row.Cells[9].Value = item.Property10;

}

radGridViewUnbound.MultiSelect = true;

radGridViewUnbound.Columns[0].IsPinned = true;

}

private List<MySample> GenerateList()

{

List<MySample> list = new List<MySample>();

MySample item = null;

for (int index = 0; index < 500; index++)

{

item = new MySample()

{

Property1 = string.Format("Row: {0}, Col: {1}", index, 1),

Property2 = string.Format("Row: {0}, Col: {1}", index, 2),

Property3 = string.Format("Row: {0}, Col: {1}", index, 3),

Property4 = string.Format("Row: {0}, Col: {1}", index, 4),

Property5 = string.Format("Row: {0}, Col: {1}", index, 5),

Property6 = string.Format("Row: {0}, Col: {1}", index, 6),

Property7 = string.Format("Row: {0}, Col: {1}", index, 7),

Property8 = string.Format("Row: {0}, Col: {1}", index, 8),

Property9 = string.Format("Row: {0}, Col: {1}", index, 9),

Property10 = string.Format("Row: {0}, Col: {1}", index, 10)

};

list.Add(item);

}

return list;

}

Regards

GridView

answered on 22 Dec 2010

11 answers

384 views

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Hi,

I have a grid that i have added a custom column containing a progress bar. This is done by adding the progressbar or updating the progressbar each time the CellFormatting event is fired. But it seems like this is done way to often?
In my opinion would i like to paint this the first time i load the row. Then I want to be able to update the progressbar in a row when the progressbar values have changed.
Now it updates this each time i click in a cell or change row. And it does not just happen to the row the i clicked in.. it fires for all visible rows in the grid.

How can i avoid this, how can i speed up the grid. NB the progressvalue function (my function) is slow as well, but fast enough if i was to set the progress value for a specific row.

Regards
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