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  1. PO
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    <p><img src="https://i.stack.imgur.com/5SMzI.png" alt="enter image description here">I tried this:</p> <pre><code>private void Form1_Load_1(object sender, EventArgs e) { ds.Tables.Add(GetTable1()); ds.Tables.Add(GetTable2()); IList&lt;string&gt; lstTables = ds.Tables.OfType&lt;DataTable&gt;().Select(dt =&gt; dt.TableName).ToList(); dataGridView1.DataSource = lstTables; comboBox1.DataSource = lstTables; //Setting the tables datasource for the comboBox. } </code></pre> <p>and then the selection change of the table comboBox event:</p> <p>private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { </p> <pre><code> var obj = sender as ComboBox; string s = obj.SelectedItem.ToString(); var y= (from x in ds.Tables.OfType&lt;DataTable&gt;() where x.TableName == s select x).ToList(); if (ds.Tables.Count &gt; 0) { IList&lt;string&gt; lstCol = new List&lt;string&gt;(); for (int i = 0; i &lt; y[0].Columns.Count; i++) { // Filling the list of columns according to the selected table lstCol.Add(y[0].Columns[i].ToString()); } // Setting dataSource for the column ComboBox comboBox2.DataSource = lstCol; //comboBox2.ValueType = typeof(string); } else { comboBox2.DataSource = null; } } </code></pre> <p>Designer.cs</p> <pre><code>private void InitializeComponent() { this.dataGridView1 = new System.Windows.Forms.DataGridView(); this.comboBox1 = new System.Windows.Forms.ComboBox(); this.comboBox2 = new System.Windows.Forms.ComboBox(); ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit(); this.SuspendLayout(); // // dataGridView1 // this.dataGridView1.AllowUserToAddRows = false; this.dataGridView1.AllowUserToDeleteRows = false; this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize; this.dataGridView1.Location = new System.Drawing.Point(26, 72); this.dataGridView1.Name = "dataGridView1"; this.dataGridView1.Size = new System.Drawing.Size(246, 150); this.dataGridView1.TabIndex = 0; this.dataGridView1.CellValueChanged += new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridView1_CellValueChanged_1); // // comboBox1 // this.comboBox1.FormattingEnabled = true; this.comboBox1.Location = new System.Drawing.Point(28, 74); this.comboBox1.Name = "comboBox1"; this.comboBox1.Size = new System.Drawing.Size(121, 21); this.comboBox1.TabIndex = 1; this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged); // // comboBox2 // this.comboBox2.FormattingEnabled = true; this.comboBox2.Location = new System.Drawing.Point(148, 74); this.comboBox2.Name = "comboBox2"; this.comboBox2.Size = new System.Drawing.Size(121, 21); this.comboBox2.TabIndex = 2; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(284, 261); this.Controls.Add(this.comboBox2); this.Controls.Add(this.comboBox1); this.Controls.Add(this.dataGridView1); this.Name = "Form1"; this.Text = "Form1"; this.Load += new System.EventHandler(this.Form1_Load_1); ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit(); this.ResumeLayout(false); } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POCascade combobox in datagridview not working properly
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      1. PTQuestion
    1. PTAnswer
    1. USVishal
    1. USVishal
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. COis you combobox inside `DataGridView`?
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      1. PO
      1. USArshad
    2. CO@Arshad Ya......
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      1. USVishal
    3. COis it possible to share screenshot or designer.cs, so that i can see both the combobox
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      1. USArshad
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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